18K Gold 10.70ct Tanzanite & 0.90ctw Diamond Ring

Updated August 8, 2026

Lot number20
Estimate16,860.00 - 33,719.00 USD
CategoryJewelry & Watches
AuctionPremier Auction: Rolex, Jewelry, Artwork & Collectibles
DateAugust 15, 2026 at 11:59 PM EDT
Auction houseA&B Gemological Services
LocationLos Angeles, California

<br> An impressive gemstone ring crafted in solid 18K white gold, featuring a substantial 10.70-carat natural tanzanite surrounded by approximately 0.90 carat of natural diamonds. <br> <br> <br> The oval-cut tanzanite displays a rich violetish-blue color and is secured in a four-prong setting. A halo of round brilliant-cut diamonds frames the center stone, with additional diamond accents along the shoulders for added brilliance and presence. <br> <br> <br> This item comes with a professional appraisal. <br> <br> <br> Specifications <br> <br> <br> Metal: Solid 18K White Gold <br> Ring Size: 7.25 <br> Total Item Weight: 6.50 Grams <br> Country of Manufacture: USA <br> Estimated Retail Replacement Value: $33,719.00 <br> Reference Number: BEL19628 <br> <br> <br> Main Gemstone <br> <br> <br> Gemstone: Natural Tanzanite <br> Shape: Oval Cut <br> Quantity: 1 <br> Carat Weight: 10.70 Carats <br> Color Grade: Violetish Blue <br> Clarity Grade: Type I <br> Cut Grade: Very Good <br> <br> <br> Diamond Accents <br> <br> <br> Gemstone: Natural Diamond <br> Shape: Round Brilliant Cut <br> Quantity: 48 <br> Total Carat Weight: 0.90 ctw <br> Color Grade: H–I <br> Clarity Grade: SI1–SI2 <br> <br> <br> Appraisal: Professional appraisal included

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