Tanzanite - The Birthstone for December

by Lapigems Gem Company 4. December 2014 20:18


Tanzanite has become very popular despite its recent discovery - so much so that it joined the league of turquoise and zircon as the December birthstone in 2002. This was no mean feat since the list had not been changed since 1912. Tanzanite was thus the first gem to be added to the birthstone list in 100 years.

Tanzanite is said to have been stumbled upon in 1967 by a Maasai tribesman who shared the crystal he had discovered with a prospector by the name of Manuel de Souza. No one knew what the stone really was and hence first speculated to be an unusually vivid and richly colored sapphire. However, it was soon discovered that the stone was more intricate and its colors more vibrant than the latter.

The stone was christened Tanzanite after its country of origin, Tanzania, in 1968 by Harry Platt, president of Tiffany and Co. who described it as “the most beautiful stone to be discovered in 2000 years.”

Tanzanite was categorized after the sapphire as the second favorite colored gemstone in the USA in 2001. While people initially bought it as a substitute for the sapphire since it was cheaper, its demand has skyrocketed in recent years as people began to value it more for its own sparkle, beauty, extreme rarity and the magic of its origins. 

Tanzanite is seen as the ultimate birthstone that represents new life. This comes from the affinity of the Maasai community with the color blue which they regard as healing, sacred and representing new life. It is therefore the perfect gift for new beginnings or celebration of a new life. If you were fortunate enough to be born in December you are one of the lucky few with this magnificent gemstone as your birthstone.

Take a look at our collection of Investment Grade Tanzanite 

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Celebrities and Tanzanite

by Lapigems Gem Company 21. September 2014 21:27
A brief look at celebrities and their Tanzanites


Tanzanite has become the darling gemstone of celebrities in recent years.  High profile events in the movie world have seen a kaleidescope of fine Tanzanites being paraded by well known faces along the red carpet. This article takes a look at some of the most famous Tanzanites to grace the silver screen.

Image source: hollywoodlife.com

Beyonce was spotted wearing a blue tanzanite, with speculations that it was inspired by the birth of her daughter, Blue Ivy and was a gift from the husband Jay Z. The ring, boasts a 10+ carat cushion cut Tanzanite of the finest color. Lapigems has recently cut a similar caliber stone a  marvelous 12.94 carat cushion cut Tanzanite

Image source: tanzanitefoundation.org

"The Heart of the Ocean" in the acclaimed movie Titanic, is another beautiful stone that is rumored to have been a Tanzanite. The blockbuster movie of 1997 revolved around the gem. The wonderful stone was set into a spectacular necklace. In one of the scenes, the lead character, Rose (Kate Winslet) requested Jack (Leonardo Dicaprio) to paint her whilst wearing only the gem. Certainly a unique way of promoting Tanzanite still unmatched!

In the movie, the Heart of the Ocean was depicted as a blue Diamond. However, in reality, blue diamonds do not possess such a deep blue saturation and the stone was actually a 28 carat heart shaped Tanzanite almost identical to this superb piece we have recently cut.

Image source: tanzanitefoundation.org

In a past Oscar award ceremony, Anne Hathaway looked dashing with Tanzanite and diamond earrings and a custom satin dress by Giorgio Armani.

Image source:tanzanitefoundation.org

Cate Blanchett was spotted wearing a tanzanite and diamond necklace in the 2011 Oscars.


Image source: eddielevian.blogspot.com

Wendi McLendon-Covey, star of the ABC series "The Goldbergs"  looked glamorous with a Blueberry Tanzanite Necklace by Le Vian in the 17th Annual Critics’ Choice Movie Awards (CCMAs) where she was nominated for Best Actress.

Image source: tanzanitefoundation.org

Sarah Jessica Parker, the doyenne of New York's social scene was recently spotted wearing a round Tanzanite and diamond pendant paired with a beautiful Tanzanite ring at the 2013 Tiffany and Co Blue Book collection. Tanzanite was actually named by Harry Platt, the president of Tiffany and Co in the late 1960’s. For the first ten years of mining, Tiffany’s had exclusive rights to Tanzanite and Sarah Jessica Parker looks very comfortable adorned in their latest creations.


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New Custom Tanzanite Collection at Hemingways

by Lapigems Gem Company 9. July 2013 05:27
New Sheelagh Zagoritis hallmarked jewelry collection at 6 star hotel HEMINGWAYS in Nairobi.


Sheelagh Zagoritis and Lapigems have been asked to design a collection of fine Tanzanite jewelry for a newly opened 6-star hotel here in Nairobi, Hemingways www.hemingways-nairobi.com . The hotel is the latest property in the Hemingways Collection which is a very well known luxury brand in the region.


The collection was launched last week and is now available directly in the Hemingways Luxury Boutique in the hotel foyer. Discerning visitors to Kenya will now be treated to the very finest Tanzanite and hand made custom-designed Tanzanite jewelry  mine-direct courtesy of the new collection. Lapigems Gem Company’s reputation for quality and specialization in the very finest, rarest 1% of Tanzanite mined and Sheelagh’s renown as a designer were what Hemingways were looking for when they decided to offer their discerning clients the very best in African gems. We were very proud to be asked to be part of this new and exciting venture.   

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Tanzanite Prices - A Brief Analysis

by Lapigems Gem Company 6. March 2013 21:28
A brief analysis of Tanzanite prices through history and forecast for 2013 and beyond.


When Tanzanite was first discovered in the late 1960’s it was controlled by Tiffany & Company who gave it its name and were the first true marketers of the gemstone. Prices were high as Tiffany commanded a monopoly and supply out of the fledgling mines was low and sporadic. This continued through to the late 1980’s. Although Tiffany no longer controlled the market, the sporadic and unreliable supply from the mines kept prices high as demand increased with consumers in the US and other markets began to learn about and appreciate this wonderful gem. Tanzania, at that time, was a communist/socialist country under president Julius Nyerere and as such all mineral wealth officially belonged to the state. This led to lack of investment in the mining of the stone and very shaky production.

In the late 1990’s and early 2000’s as Tanzania adopted a capitalist economy, production stabilized and rose leading to a drop in prices further compounded in 2001 when the stone was implicated as a funding source to Al Qaeda in the aftermath of the 9/11 tragedy. Large retailers like Zales announced they were no longer going to sell Tanzanite and others followed suit leading to a catastrophic decline in prices. Fortunately this state of affairs did not last long as a full State Department / CIA report released in early 2002 cleared the industry of any links to Al Qaeda and Tanzanite rose again.



From 2002 to 2007 prices surged. From lows of $200 per carat for medium to medium/fine goods they rose to the heady heights of $600+ per carat before dropping back by 20-30% in the ravages of the recession in 2008/2009. The recession did not affect the prices of the very finest grades but medium/fine material and lower grades were severely affected. The finest grades were bolstered by ongoing demand from the relatively unaffected highest income brackets in the developed markets coupled with extremely low supply due to their rarity. Lower grades by contrast, lost up to 50% of their price value through 2009.

Through 2010 into 2013 prices have stabilized and returned to their pre recession levels and prices for the very finest stones are edging upwards again. China’s recent foray into the market and growing demand for Tanzanite in that country is another wild card that could affect the price trajectory in coming years. A lot will depend on the recovery of the largest market, the US and the buying power of the middle class consumer there. This will be the propeller for Tanzanite sales in the medium to medium/fine grades. The finest grades will likely see continued price inflation through prevailing low supply due to their rarity and high demand from high income brackets in the US and China markets in line with that of other gems such as ruby and emerald which have seen record prices reached for fine select stones at auction in 2012.

Our view on this is backed up by a recent article in National Jeweler which talks about how the impact of the rise of the Chinese and other emerging markets is affecting colored stone prices, Tanzanite being one of the main stones affected. Our view remains that the more ubiquitous qualities of Tanzanite, the medium and medium/fine grade colors will always be more susceptible to the vagaries of the market but the very finest stones will always hold their value and experience steady price inflation due to their rarity and burgeoning demand.  


Further Reading on this Subject

Tanzanite as an investment - how economics favors the gem type. 

Lapigems Gem Company

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Tanzanite Heating - The Facts

by Lapigems Gem Company 17. January 2013 04:07
Tanzanite Heating. Why Tanzanite is heated and how it is heated.

Article by Antony Zagoritis (Graduate Gemologist, GIA)

Tanzanite, the blue variety of the mineral Zoisite, is a trichroic gemstone. In layman’s terms this means that it displays 3 different colors on 3 different axes/directions. In the rough state, when Tanzanite is mined, its appearance is largely of a brownish, treacle color. This is due to the dominance of the reddish/brown axis. The photograph below shows some Tanzanite before heating.


The blues and violets that Tanzanite is so well known for do not emerge until the stone is heated. This process is usually done in a gemological oven, at between 400 and 600 degrees centigrade. The heating process removes the brown / burgundy axis, leaving just the blue and violet axes. The heating process serves to render Tanzanite dichroic and permanently changes its original trichroic characteristics.

The photo below shows the same stones after heating.



The Science behind it

In scientific terms, color in Tanzanite is largely caused by the presence of Vanadium. Trace concentrations of vanadium within Tanzanite's crystals structure causes its unique color. It is believed that the Vanadium originates principally from the derived graphite within the deposit. Tanzanite's color largely relies on the Titanium and Vanadium ratio within its crystal structure. The heating of tanzanite results in a valence exchange reaction (redox reaction) Ti 3+ + V 4+ → Ti 4+ + V 3+ which causes an increase in the violet and blue color and renders the titanium colorless.

All Tanzanite is heated. Some pieces are partially heated in the ground and are mined already with some blue but these are generally heated anyway to remove any residual brown. The process is universal to the gemstone and in no way does it affect the value of the stone. Without heating, Tanzanite would be brown and the beautiful blues that are so loved would not be in existence. In fact, legend of the discovery of the stone back in the 1960’s dictates that the Maasai warriors who found it, did so after a large bushfire swept the area. The fire burnt all the foliage and undergrowth back revealing some Tanzanites on the surface and also heated them making them a sparkling blue and suddenly eyecatching. Without the fire, Tanzanite may never have been discovered as the Maasai may not have noticed them in their brownish shades against the bare, burnt earth.

Is Heating Considered an Enhancement in the Trade?

Unlike with other gemstones like Sapphires or Rubies, where heating at extremely high temperatures is used as a way of altering the actual grade of a gemstone, the heating process in no way enhances a Tanzanite’s color saturation levels it simply removes the red/brown axis leaving the blue/violet. A medium grade Tanzanite will appear lightish brown before heating and a medium pale blue/violet after heating. A top grade piece will be a deeply saturated brown before heating and a deep blue/violet after heating. Hence the process is not an enhancement, as it is with some gemstones such as Corundum..



Lapigems Gem Company

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Tanzanite Synthetics and Imitations

by Lapigems Gem Company 22. December 2012 23:16
A discussion of the different synthetics and imitations of Tanzanite

One question we are often asked on our “Ask a Gemologist” forum is how to tell if a Tanzanite is real and if there are fakes out there that buyers should be aware of. This is a very pertinent question, particularly in this age of gemstone treatments. Fortunately, Tanzanite has not been targeted the way stones like Sapphire have for extensive undisclosed treatments. Ways in which Sapphires can be extensively chemically and physically altered to improve their appearance have been around for decades now and more methods are always being developed, particularly in Thailand, where a great deal of the rough is cut. Fortunately Tanzanite is not in the same position. However, there are factors to be aware of.


Firstly, whilst Tanzanite has never been successfully synthesized (a synthetic is a lab created, manmade version of the natural which has the same chemical and physical properties as a natural), a synthetic Forsterite has been produced in the last decade in Russia which produces an imitation which closely resembles Tanzanite, although only the lower/medium grades of Tanzanite. Some unscrupulous sellers have unscrupulously sold it as Tanzanite in the past. As a gemologist, it is easy to identify this imposter using several tests, chiefly the refractometer. Synthetic Forsterite has a refractive index of 1.63- 1.67 which natural Tanzanite is 1.685-1.707.

Similarly, a useful tool called a Hanneman Filter easily separates out the forsterite as it shows up green in the filter as opposed to the orange-pink natural Tanzanite will show. However, as a layman without gemological tools at your disposal, there is a property of the synthetic that makes it identifiable using a simple loupe. Synthetic Forsterite has a very high birefringence. Without getting too technical, this means that the stone can exhibit “double refraction”. As a layman you can spot this by looking closely at the back facets with a loupe. Look through the table and focus on the pavilion facets. They may appear as if they are doubled up. This is a clear sign of a synthetic forsterite as natural Tanzanite does not have a high birefringence and as such will not display this effect.


The other factor to be aware of in Tanzanite is the more recent attempt by unscrupulous sellers to coat lower grade Tanzanite with a light coating of cobalt, which tends to improve the look of the color. Whilst this practice is not widely used, it is important to be aware of it. This article in our Article Center looks at this in more detail : http://www.lapigems.com/Articles/Gemstone-Treatments-Coating-Chemical.aspx

Buying Tanzanite should be an exciting exercise, as you are purchasing something beautiful and rare. However, it is important to be informed of the pitfalls out there and to be able to sidestep them as an informed buyer.


Lapigems Gem Company

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What Exactly is "Red Flash" in Tanzanite?

by Lapigems Gem Company 3. October 2012 05:55
A description of what the red flash effect in Tanzanite really is.

One of the most common questions we get in our award winning “Ask a Gemologist” panel is “what is red flash in tanzanite and is it important? Many jewelers today are using the phenomenon to promote the “mood changing” abilities of Tanzanite and the phrase is now in the public domain in a big way. Many people are confused by the terminology or simply disappointed if a Tanzanite they have purchased seemed to have plenty of red flash in the jeweler’s store but none when they are looking at it at home.  

Red Flash is simply a function of Tanzanite’s trichroism. To explain further – Tanzanite os one of the gem kingdom’s only trichroic gemstones. As such it displays three different colors on three different axes. This article in our article center goes into much more depth on this   

Tanzanite’s reddish violet axis is more visible in a warmer light whilst its blue axis is more visible in a cooler light. This article explains how light works in gems for a better understanding of the issue.   

The result is that under a warm light source Tanzanite displays a much more violet hue with “flashes” of red and pink coming from the violet axis. All Tanzanite has this phenomenon and it does not affect its value in any way. As a rule, the deeper the color saturation of the stone, the more pronounced is the red flash effect.  

Lapigems Gem Company

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The Problem with Gem Cutting

by Lapigems Gem Company 29. August 2012 04:46
The risks and pitfalls in cutting rare gemstones like Tanzanite

When you see a beautifully cut gemstone in a piece of jewelry, its beauty can be captivating. However, very rarely is the sheer skill and risk involved in cutting rare gems appreciated. .

Cutting rare gemstones like tanzanite can be a risky business indeed. So many things can go wrong along the way for the gem cutter. He starts with a simple piece of rough which can be very unexciting to look at and is faced with the task of transforming it into something exceptional. Preforming is the first stage after the rough has been carefully evaluated for inclusions and to ascertain which shape would be best to cut. This is a risky stage as the rough is preformed by hand using a spinning faceting disk. Heat is generated at this point and often non-visible stress fractures can exist within a stone which can cause the stone to shatter or break at this stage.

As you may have guessed , this post is inspired by one such incident in our cutting offices recently which highlights the risks. We were cutting a beautiful and very rare piece of orange Tanzanite which promised to yield over 8 carats of sparkling splendor. Instead, during the performing process the stone, previously flawless started producing thin cracks as we watched. A surreal experience as there is nothing you can do about it. The non-visible stress fracture within the stone, caused by the crystal forming under great pressure, yielded to the heat generated by the performing process and “crazed” – cracked in several different directions.

This problem is not limited to colored gemstones and Diamonds often cause great distress by performing the same trick on their beleaguered cutters! So next time to are looking at a beautiful faceted gemstone, whether Diamond or colored stone, appreciate the great skill and pure miracle that it has survived several hundred million years under pressure and heat in the earth and then successfully navigated the path through the cutting process!

Read more about how gems are cut in our article on Gemstone Cutting

Lapigems Gem Company

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Gem Industry Anticipates Exciting future for Tanzanite

by Lapigems Gem Company 12. April 2012 05:25
Tanzanite's future is bright. This entry explores the reasons why.

Change has been building in the Tanzanite industry over the past couple of years. We have highlighted the rise of emerging markets like China in past posts, commenting on the proliferation of Chinese buyers in the local market recently. This is a symptom of the larger change that has been engulfing the industry of late. Traditionally, western markets have purchased the bulk of Tanzanite production, harking back to the late 1960’s when Tiffany & company first unleashed this remarkable gemstone upon the world. Whilst western markets are still heavily influential in the Tanzanite industry, emerging markets such as China have been awakening and are becoming more involved each passing year.

The impact from this is profound. Firstly, the traditional markets in the west are now competing with the newcomers for production, particularly the finest stones. This has had the effect of creating inflation in the market where it wouldn’t have existed before. When the financial crash of 2008 hit the world, western markets still dominated the Tanzanite industry. As a result, the crash and resulting drop in demand in the west had a strong impact on Tanzanite prices. Whilst the very finest, rarest grades were not affected, medium grades lost a substantial part of their value. As the recession has worn on, prices had remained stagnant until this past 2 years, when price inflation started creeping back into the sector. Dealers who dealt exclusively with the west couldn’t understand where the inflation was coming from as their experience was that demand in the west was fairly flat. Those that had a wider reach however, understood fully that other influential buyers had entered the market and the increasing demand from these countries was behind the upward push in prices.

Overall, this is good for the industry as it creates a hedge to price deflation during recessionary times as well as new driver for growth and price inflation which will give investors in this beautiful stone every reason to be excited. Tanzanite’s “eggs are no longer in one basket” as the saying goes! Richland Resources’ Gavin Pearce and TanzaniteOne sightholders Colorjewels and AG Color are confident that demand for tanzanite, the purple-blue gemstone that has captured the fascination of jewellers and aficionados worldwide, will continue to gain momentum in 2012. More on this topic in this Jewelry News Asia article.

Lapigems Gem Company

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Tanzanite Sales Strong Despite Market Turmoil

by Lapigems Gem Company 10. August 2011 00:24
Tanzanite sales remain strong despite recent market turmoil. could this mean it is being regarded as a safe haven asset?

Watching the news and reading the papers has become a depressing experience this past few months as we bear witness to a litany of pressures on the financial system. Gold has hit a record high of $1700 per ounce and the Swiss Franc has been strengthening rapidly as people rush for perceived safe havens. It is perhaps as a result of this that Tanzanite sales have continued to rise through this period – it is increasingly being viewed as a “safe haven” tangible asset.

TanzaniteOne, the largest miner of the beautiful blue gemstone has just published very strong second quarter results showing a marked increase in both production and sales. This is the second quarter in a row showing strong growth. The first quarter of 2011 reported production of 609,737 carats of tanzanite, representing a year on year increase of 8 percent. Sales in contrast, rose 48 percent. In the second quarter, they reported a further 57 percent increase in sales on quarter 1.

This increase may also have something to do with China’s growing love affair with the stone. In the past two years, we have noticed a marked increase in the number of Chinese buyers in the local market. This could prove good news for investors in Tanzanite, holding fine pieces. An ever-growing market in the East will only serve to bolster already high demand in the West, which should continue to have a strong impact on value.

Further Reading on this Topic

Daily News Article "Tanzanite Sales Go Up"

National Jeweler - "Tanzanite Prices on the Rise"

Fine Tanzanite in Lapigems block D Private Collection 


Lapigems Gem Company

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Tanzanite Selection and Sorting

by Lapigems Gem Company 20. January 2011 05:05
Cherry picking out the finest Block D Tanzanites at Lapigems Gem Company

Tanzanites in our online collection are cherry-picked from many thousands of carats that we see each month. We are incredibly selective in this regard and stones have to be of the very finest pedigree in order to qualify for the collection. This month, we have been privileged to see much of the mines’ production and from 1020 carats of cut pieces we selected 10 only for our online collection. This gives a good idea of the rarity of the very finest Tanzanites.The picture below shows a typical parcel after cutting. 

Perhaps one piece from here may make the grade for our online collection. The rest will be sold on to manufacturers.

Sorting takes into account many factors but color grade is the principal one in defining a Tanzanite’s quality. Highly intense, deep color saturations are rare, especially in small stones and we seek these out voraciously. However, clearly a fine color is not everything and clarity is important, as Tanzanite is classified as a Type 1 gemstone by the GIA, and as such is expected to be high clarity. All the pieces in our collection are flawless. Lastly, cut is vital, as it is responsible for relaying the beauty of the stone to the eye. Poor cuts are not acceptable.  

Stone sorters at Lapigems have over 100 years of experience between them and use their deep understanding of gem qualities to select out the very finest for Lapigems members.    

Lapigems Gem Company

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Tanzania Bans Export of Rough Tanzanite

by Lapigems Gem Company 22. August 2010 12:49
The Tanzanian Government recently passed a law, as an extension of the Mining Act, banning the export of rough Tanzanite. The government hopes this will increase investment at home in cutting and polishing and bring back more revenue to the gemstone's home country.

The Tanzanian Government recently passed a law, as an extension of the Mining Act, banning the export of rough Tanzanite. The government hopes this will increase investment at home in cutting and polishing and bring back more revenue to the gemstone's home country.
Until the law was passed, the vast majority of Tanzanite was exported rough to countries such as India, where the processing was done. These processing countries earned most of the revenue from the sale of Tanzanite, whilst Tanzania earned only a small percentage. The government hopes the ban will encourage the growth of processing facilites in East Africa and also give a boost to miners. Mining provides direct employment for around 14,000 workers in Tanzania at present.

How does this affect you and your Tanzanite collection?

We realize that many of our clients have invested carefully and at length in their Tanzanite collections and some are concerned as to how this ban may affect their value.
It is difficult to predict exactly how the ban may play out in the market. What is certain is that the supply side of the economic equation will be affected. Tanzania does not have the ability to process anywhere near the volume of Tanzanite that was previously being processed abroad in the past few years. Hence, the likelihood of a substantial decrease of supply to the world market is high. If we are to follow traditional economic theory, when there is a significant decrease in supply and demand levels remain the same, price increases. Hence, there is a distinct possibility of an imminent price hike in the near future if these fundamentals prove to hold true.
However, an examination of the current state of the Tanzanite market as it stands now, throws up some curveballs for consideration. The above will only hold true if demand levels remain the same or even increase. In the current uncertainty gripping the world, there is no guarantee of that. Certainly in 2009, at the height of the "Great Recession," prices of medium grade Tanzanites almost halved as supply far outstripped demand. However, interestingly, prices of the finest 1% remained solid. The reason for this was simple, the supply of these very rare pieces was rock bottom - there are very few being produced. Hence a drop in demand did not affect the price as supply was so low and demand in the past few years has far outsripped supply. Secondly, more and more people, worried about the effects of inflation and large national fiscal deficits on their currencies, opted to buy tangible investments. Gold was the biggest beneficiary (the gold price is the highest it has been in decades). Tanzanite in the finest grades was another beneficiary. Many savvy investors chose to put a portion of their investable capital into carefully selected, very fine Tanzanites. This increase in specialist demand also had an impact on price.
The lesson from the last few years is clear and is applicable to this latest development. The ban on rough export will likely only really affect the price of the finest goods. Stocks of medium grades are still very high in India and other cutting centres and the ban will likely only marginally affect these goods. The rarest 1% however, will become even harder to find as the old channels of distribution close up. This will likely affect the price upwards, despite the prevailing soft market conditions.

Further Reading on this Topic

Bloomberg Report on the Ban

News Service Report on the Ban

Lapigems Gem Company

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