North American Auction Company
Timed Auction

Last Chance September Passed Lots Auction

Mon, Sep 25, 2023 02:00AM EDT - Fri, Sep 29, 2023 03:00PM EDT
Lot 56

11.81ct Tanzanite VS2 Diamond & Platinum Ring

Estimate: $18,000 - $36,000

Bid Increments

Price Bid Increment
$50 $10
$100 $25
$500 $50
$1,000 $100
$2,000 $250
$5,000 $500
$10,000 $1,000
$35,000 $2,500
Featured in this lot is this 11.81ct Tanzanite VS2 diamond and platinum ring with AIG and GIA paperwork. The ring features a polished, stamped, and tested platinum construction and is marked 'Orianne' for the hallmark and a 'PT950' stamping on the inside of the ring band. The ring features a centerstone of a pear modified brilliant cut natural Tanzanite gemstone that measures 17.53 x 12.51 x 9.12mm with eye clean clarity and is considered Type I with medium dark moderately strong violet color with a total weight of 11.81 carats. The center stone is decorated with a total of 50 round brilliant cut diamonds that shows VS2 - SI2 clarity and coloration of F-H with a total diamond weight of 1.72 carats. Tanzanite Is a very rare precious gemstone that is only found in the Usumburu Mountains that border the Umba Valley of northern Tanzania. Originally discovered in 1967 by Tiffany & Company who named the stone Tanzanite. Tanzantite is unique due to its exceptional pleochroism (an optical phenomenon in which a stone has different colors when observed at different angles). This example is a nearly flawless eye clarity and unbelievable depth with transparent finish. The piece comes complete with AIG(American International Gemologists, a GIA certified lab AIG Appraisal Number#: 000718176202 report and appraisal confirming the above info and giving a total value of $36,805.00. GIA (Gemological Institute of America) Tanzanite Grading Report#: 2175582593. The ring size is US 7. RN024903.