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8.75ct Tanzanite and 1.10ctw Diamond Platinum Ring(GIA CERTIFIED)

Auction #1573 | Item #17

Current Bid: $4,000

Appraised Value: $27,170

This lot is sold or expired.

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One electronically tested platinum ladies cast tanzanite and diamond ring with a bright polish finish. The featured tanzanite is set within a diamond bezel supported by a lattice under gallery and tapering diamond set shoulders, completed by a three millimeter wide band. Trademark is Orianne. Identified with markings of "PT950". Condition is new, good workmanship.


One prong set oval modified brilliant cut natural tanzanite, measuring 15.03 x 11.23 x 6.81mm, exact weight 8.75ct., clarity is eye clean, type I, dark, very slightly grayish, violetish blue color, (GIA vB 7/3), cut is good. Transmitting light with no distortion, transparent. GIA Gemological Report attached. Graded loose prior to setting in the GIA Laboratory, Report #2175379288.Tanzanite is a very rare gemstone that is only found in the country of Tanzania. Originally discovered in 1967. Tiffany & Company, named the stone Tanzanite. It is found in the Usumburu Mountains that border the Umba Valley of northern Tanzania. Tanzanite occurs in gray, brown, violet, blue, reddish-purple, & green. The gem is interesting because of its exceptional pleochroism. Rotated in different directions a tanzanite will exhibit multiple changes of color. Tanzanite has a low tolerance to ultrasonic cleaning, and should not be cleaned using this method.

Forty-Six prong set round brilliant cut diamonds approximate total weight of 46 Stones = 1.10ct. Graded in the setting.

Clarity         VS-1 to VS-2   

Color           F - H


Total Weight of Colored Stones   8.75 ct. 

Total Weight of Diamonds   1.10 ct. 

Total Weight of Ring  10.17 gm