Lot 664
Treasured Tanzanite (750 carats). Merelani Mine, Arusha, Tanzania
At approximately 750 carats, this is a very large and impressive Tanzanite crystal showing a striking duality of colors - purple on the sides and intense blue on the front view plane. The contrast is seen simply by turning the crystal 90 degrees, This duality effect is what makes Tanzanite gemstones so treasured, as the change of colors from intense blue to intense purple makes them very eye-catching.
Tanzanite is a rare, natural gem variety and occurs in this intensely colorful form from only a small mining district in Tanzania, East Africa. As with most tanzanite gems and crystals, this specimen was slightly heated after mining to enhance the natural dual colorations to their highest quality. Over time, the production of quality specimens have declined and the mines have been consolidated, leading to price increases at the source. Today, large crystals are hard to find and have gradually become more expensive.
The crystal cluster is complete all around (360-degrees) except for a few small abrasions on the backside. This particular crystal has a substantial intrinsic value of gemstone rough within its termination and from these large transparent areas fancy gems can be cut.
Measures: 8.4 x 3.5 x 3 cm.
Weighs approx. 750 carats (150 grams = huge).
A custom lucite base for display is included.
Estimated Value $35,000 - 45,000.
Private Collection.
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