GARNET(TSAVORITE)[GEM]

Listing descriptio
Tsavorite or tsavolite is a variety of the garnet group species grossular, a calcium-aluminium garnet with the formula Ca3Al2Si3O12.[2]Trace amounts of vanadium or chromium provide the green color.
In 1967, British gem prospector and geologist Campbell R. Bridges discovered a deposit of green grossular in the mountains of north-east Tanzania[3] in a place called Lemshuko, 15 km (9.3 mi) away from Komolo, the first village. The specimens he found were of very intense color and of high transparency. The find interested the gem trade, and attempts were made to export the stones, but the Tanzanian government did not provide permits.

detailed description
Believing that the deposit was a part of a larger geological structure extending possibly into Kenya, Bridges began prospecting in that nation. He was successful a second time in 1971, when he found the mineral variety there, and was granted a permit to mine the deposit. The gemstone was known only to mineral specialists until 1974, when Tiffany and Co launched a marketing campaign which brought broader recognition of the stone.[3]
Bridges was murdered in 2009 when a mob attacked him and his son on their property in Tsavo East National Park. It is believed that the attack was connected to a three-year dispute over access and control of Bridges' gemstone mines.[4]
The name tsavorite was proposed by Tiffany and Co president Sir Henry Platt in honor of Tsavo East National Park in Kenya.[3] Apart from the source locality in Tanzania it is also found in Toliara (Tuléar) Province, Madagascar. Small deposits of gem grade material have been found in Pakistan and Queen Maud Land, Antarctica. No other occurrences of gem material have been discovered.[5]
Rare in gem-quality over several carats (1 carat = 200 mg), tsavorite has been found in larger sizes. In late 2006 a 925-carat (185.0 g) crystal was discovered. It yielded an oval mixed-cut 325 carat (65 g) stone, one of the largest, if not the largest faceted tsavorites in the world. A crystal that yielded a 120.68-carat (24.136 g) oval mixed-cut gem was also uncovered in early 2006.[6]
Tsavorite formed in a Neoproterozoic metamorphic event which involved extensive folding and refolding of rock. This resulted in a wide range of inclusions forming within most Tsavorite crystals. These inclusions are strong identifying features in Tsavorite.
PRICE
$11454672.17/KG OR $5206669.17/IB

For more information:

mobile: +2348039721941

contact person: emeaba uche

e-mail: emeabau@yahoo.com

website: www.franchiseminerals.com


Comments

Post a Comment

Popular posts from this blog

AGATE[GEM]

Image
Listing description Agate (pronounced /ˈæ ɡə t/ ) is a microcrystalline variety of quartz ( silica ), chiefly chalcedony , characterised by its fineness of grain and brightness of color. Although agates may be found in various kinds of rock, they are classically associated with volcanic rocks but can be common in certain metamorphic rocks . [1] Detailed description Etymology and history The stone was given its name by Theophrastus , a Greek philosopher and naturalist, who discovered the stone along the shore line of the river Achates ( Greek : Ἀχάτης ) sometime between the 4th and 3rd centuries BC. [2] Colorful agates and other chalcedonies were obtained over 3,000 years ago from the Achates River, now called Dirillo , in Sicily . [3] Ancient use Agate is one of the most common materials used in the art of hardstone carving , and has been recovered at a number of ancient sites, indicating its widespread use in the ancient world; for example, archaeological recovery a...
Read more

ALEXANDRITE

Image
The alexandrite variety displays a color change ( alexandrite effect ) dependent upon the nature of ambient lighting. This color shift is independent of any change of hue with viewing direction through the crystal that would arise from pleochroism . Both these different properties are frequently referred to as "color change", however. DETAILED DESCRIPTION The alexandrite variety displays a color change ( alexandrite effect ) dependent upon the nature of ambient lighting. This color shift is independent of any change of hue with viewing direction through the crystal that would arise from pleochroism . Both these different properties are frequently referred to as "color change", however. Alexandrite results from small scale replacement of aluminium by chromium ions in the crystal structure, which causes intense absorption of light over a narrow range of wavelengths in the yellow region of the spectrum. Alexandrite from the Ural Mountains in Russia is gree...
Read more

TOURMALINE(RUBELITA)GEM

Image
Listing description : MINERALOGY:  The  pink tourmaline , also known as rubelita originates primarily in plutonitas acids, specifically  pegmatite , where forms large  crystals . Through the action of gases containing  boron, from the magma of the host rock, tourmaline it can also arise as inclusion neumatolítica  ( generated depth of the crust (Plutonism) by intrusion of magma, which causes alteration in petrographic composition of the invaded rocks ) then the crystals are included heavily on rock, the  pink tourmaline  consists of different mineral elements, but always has the same structure, the metals are always included in tourmalines and are causing varieties this mineral colors,  the pink tourmaline carries traces of manganese  that is what gives her cute pink. Detailed Description: MYTHOLOGY:  It was found in the Minas Gerais (Brazil)  crystal pink tourmaline (rubellite) of 109 cm.  pink tour...
Read more