North American Auction Company
Live Auction

New Year January Western Collector Sale

Sat, Jan 23, 2021 11:00AM EST
Lot 161

Usumburu Mountain Tanzanite 6.29ct VS Diamond Ring

Estimate: $7,750 - $9,750

Bid Increments

Price Bid Increment
$0 $5
$50 $10
$100 $25
$500 $50
$1,000 $100
$2,000 $250
$5,000 $500
$10,000 $1,000
$25,000 $2,500
$100,000 $5,000
Featured in this lot is this Usumburu Mountain tanzanite 6.29 carats VS diamond ring with GIA and AIGL paperwork. This ring shows a polished, stamped, and tested platinum ring with a bright finish and is stamped 'Orianne' with 'PT950' stamp on inside of the ring band. The center stone is a pear shape tanzanite stone showing a brilliant cut crown and a modified brilliant cut pavilion with a violetish blue color, very good cut grade, and a weight of 6.29 carats. The center stone is profusely decorated with a halo design and a vintage setting to the shoulders and shows 37 natural brilliant round cut diamonds with a weight of 0.73 carats, clarity grade of VS1-SI1, and a color scale of G-H. Tanzanite is a very rare, precious gemstone that is only found in the Usumburu Mountains that border the Umba Valley of northern Tanzania. It was originally discovered in 1967 by Tiffany & Company, who named the stone Tanzanite. This example is unique due to its exceptional pleochroism (an optical phenomenon in which a stone has different colors when observed at different angles). The piece comes complete with AIGL Inc. (American International Gemological Laboratories, Inc. a GIA certified lab AIGL#: K65E68-EA14775) report and appraisal confirming the above info and giving a total value of $16,748.00. The ring size is US 7 1/2.
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