Tanzanite Double Crystal

Lot Closed

December 3, 08:12 PM GMT

Estimate

30,000 - 35,000 USD

Lot Details

Description

Tanzanite Double Crystal

Merelani Hills, Lelatema Mts, Arusha Region, Tanzania

2½ by 1¾ by 1 inches (6.4 x 4.5 x 2.2 cm).

This natural double crystal specimen displays a glassy luster and produces different results when viewed from different angles. Under incandescent light, one axis shows deep purple with reddish highlights, the second axis shows a sapphire blue, and the third axis displays a deep pinkish-orange-red.

Tanzanite is one of the few gem materials that displays different colors depending on which direction the viewer looks through the crystal. It is not unusual to see sapphire blue, golden orange and reddish purple...all in the same crystal. When facetted, it is this property of changing color that gives tanzanite its stunning allure. As such, uncut crystals of tanzanite with clean areas of facetable material are remarkably unique and valuable.

Adding to this specimen's rarity is the fact that it has not been heat treated. Almost all tanzanites—even those that remain uncut—are heated to bring out richer hues of blue, red, and purple, while eliminating any orangey-brown undertones. The incredible, non-heat treated specimen offered here boasts these colors naturally, making it a truly unique and exceptional find.

Heritage Auctions, Beverly Hills, June 2010

Private New York collection from 2010 until present