Photographic & Video Logs of
TRMC307

Log of TRMC307 on completion of cutting
Cut Shape : Emerald Cut

TableViewImage

Video Log of TRMC307 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 TRMC307 in its rough state

Rough Image

ID # TRMC307

Geological History

Nestled along the contorted shoreline at the southern tip of Lake Kivu lies the small town of Bakavu. Some of Congo’s finest Tourmaline is mined here by hardy artisanal miners who sink shafts along the rich Tourmaline reef nearby. Bakavu is a bustling Tourmaline trading town along with its neighbor Numbi. This stunning Tourmaline hails from this unassuming place. It was hewn from the Precambrian rock by a cooperative group of miners, but it formed many millions of years ago. Congo’s Tourmaline is formed from granitic pegmatites forming part of a Central African cluster of pegmatite fields. Pegmatites are “veins” of minerals within their host rock caused by mineral rich ground water and hot magma.

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 www.lapigems.com 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 : Faceted African Orange Tourmaline
Weight : 4.37 carats
Shape : Emerald Cut
GIA Color Grade : vslpiOr 6/5more info
GIA Clarity Grade : VVSmore info
Species : Tourmaline
Variety : Tourmaline
Refractive Index : 1.62
Cause of Color : Iron / Manganese
Specific Gravity : 3.06
Optic Character : DR Unixial
Crystal System : Trigonal
Treatments : None
Country of Origin : Congo, Africa

Mining Report

Date Mined : 10th January, 2019
Mining Location : Bakavu, Congo
Explore the Mining Location : MAP | SATELLITE | TERRAIN
Type of Source : Secondary Alluvial
Mining Method : Panning
Host Rock : Alluvial
Chemical Composition of rough : (Ca,K,Na)(Al,Fe,Li,Mg,Mn)3

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

 

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