4.20 Crt Tanzanite AAA Top Quality Faceted Gemstone

Item Information

Dimensions (mm) 11 x 9 x 5mm
Weight (carats) 4.2 carats
Colors

Tanzanite is the blue and violet variety of the mineral zoisite (a calcium aluminium hydroxyl sorosilicate) belonging to the epidotegroup. The gemstone was discovered by Manuel d’Souza in the Merelani Hills of Manyara Region in Northern Tanzania in 1967, near the city of Arusha and Mount Kilimanjaro. Tanzanite is only found in Tanzania, in a very small mining area (approximately 7 km long and 2 km wide) near the Mirerani Hills.

Tanzanite is noted for its remarkably strong trichroism, appearing alternately blue, violet and burgundy depending on crystalorientation. Tanzanite can also appear differently when viewed under alternate lighting conditions. The blues appear more evident when subjected to fluorescent light and the violet hues can be seen readily when viewed under incandescent illumination. In its rough state tanzanite is usually colored a reddish brown, and much of it requires heat treatment to remove the brownish “veil” and bring out the blue violet of the stone.

Description:

                      The Above stone is 100% Natural & Mined from earth .The Cutting is perfect & beautiful quality for collection you will love is may be a slight change due to device resolution .

Treatment : HEATED

Clarity : VS

Note:
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Pricing & Details

Bid Increment $1
Starting Bid $1
Auction ID 803881
Watchers 22 watching
Viewed 587 times
Starts 15th Feb 2019 5:20am PST
Ends 18th Feb 2019 5:18am PST

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