Photographic & Video Logs of

Log of SPC135 on completion of cutting
Cut Shape : Oval


Video Log of SPC135 on completion of cutting

HD VIDEO taken in Natural North Daylight (approx 5500 Kelvin). This movie has been professionally videoed and is of the actual piece represented.
We do not use stock videos.

Log of SPC135 in its rough state

Rough Image

ID # SPC135

Geological History

Spinel is chemically and geologically a close relative of ruby and sapphire, and in fact, two of the most famous rubies in the world, the Black Prince’s and the Timur, are really red spinels. Spinel, Ruby and Sapphire occur in the same environments. This beautiful Spinel began its formation somewhere between 600 million years and 500 million years ago. In the Morogoro area of Tanzania, in East Africa. It formed due to a process called metamorphism. As magma pushed its way up through the existing rock the contact between the invading magma and the older rock caused a change to occur. The intense heat made the nearby minerals recrystallize into minerals stable at the higher temperature. This Spinel was one of these. Millions of years later, there was a huge tectonic shift in the earth and a large section of land fell downwards. The Spinel that had formed lay below this shifting plate. Today, it would lie at some considerable depth below the earth’s surface. However, sometime between that time and this, pressure forced magma to explode towards the surface in flues and this Spinel was one amongst many crystals which was forced upwards in this explosion. As the years passed weather erosion and flooding washed the Spinel deposit away from its host rock and carried it tumbling some distance. Over time this was covered in further deposits of soil and rock. It remained there until very recently when it was discovered by local prospectors and brought to Nairobi for sale. It was bought by Lapigems Gem Company and cut. A journey of hundreds of millions of years has paused here.

Gemstone Reports And Certification

This gemstone has several reports prepared for it by a GIA Gemologist and these reports are shipped with it.

Gemstone Grading Certificate

This certificate is a full and detailed grading report utilizing the Gemological Institute of America Grading system.

 View the certificate for this gemstone

 Learn about the certificate

Mining & Geology Report

 View the Mining and Geology Report for this gemstone

This report has been prepared by a GIA Gemologist at Lapigems Gem Company. All gemological tests were performed using current techniques and using current gemological equipment. The gemstone here reported is certified and this report, combined with the printed photo-certificate constitutes a thorough certification of this gemstone from mine to private owner.

Private Ownership Registration
Registered on worldwide gemstone registration service. Registration information only available by password to account holder.

If you purchase this gemstone, full ownership registration and this history information will be stored in your account as a personalized Gem History & Ownership Report

Quality Report

Color - 4
Clarity - 4
Cut - 4
Rarity - 4

How are these quality allocations reached?

Color Clarity Cut Rarity

Gemstone Grading Report

The gemstone here described has been identified as a natural gemstone and has the following description :

Description : Intense Mahenge Pink Spinel
Weight : 0.7 carats
Shape : Oval
GIA Color Grade : vslorPi 6/6more info
GIA Clarity Grade : VVSmore info
Species : Spinel
Variety : Spinel
Refractive Index : 1.718
Cause of Color : Manganese / Cobalt
Specific Gravity : 3.54
Optic Character : SR
Crystal System : Cubic
Treatments : None
Country of Origin : Tanzania, East Africa

Mining Report

Date Mined : 20th August, 2019
Mining Location : Mahenge, Tanzania
Explore the Mining Location : MAP | SATELLITE | TERRAIN
Type of Source : Secondary Alluvial
Mining Method : Open Cast
Host Rock : Crystalline Limestone
Chemical Composition of rough : Manganese Alluminium Oxide

Gemological Testing Methodology

Gemological Tests performed on this gemstone by a GIA Gemologist include but are not limited to:

Refractive Index, Specific Gravity, Pleochroism, Polariscope to ascertain Optic Character, Spectroscope to ascertain spectrum, Magnification with GIA Microscope using darkfield lighting, Chelsea Filter, Ultraviolet Flourescence.

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Lapigems Gem Company is a member of / staff hold qualifications from the following leading Gemological Organizations