18k Gold 11.20ct Tanzanite & 1.35ctw Diamond Ring

Updated September 6, 2026

This auction ended on September 11, 2026. See upcoming auctions from A&B Gemological Services or current jewelry & watches auctions.

Lot number	344
Estimate	18,900.00 - 37,800.00 USD
Category	Jewelry & Watches
Auction	Exceptional Estate Treasures – Rolex, Jewelry, Art & Collect
Date	September 11, 2026 at 11:59 PM EDT
Auction house	A&B Gemological Services
Location	Los Angeles, California

18K White Gold 11.20ct Tanzanite and 1.35ctw Diamond Ring An impressive gemstone ring crafted in solid 18K white gold, featuring a substantial 11.20-carat natural tanzanite surrounded by approximately 1.35 carats of natural diamonds. The square-cut tanzanite displays a rich violetish-blue color and is secured in a prominent raised setting. A diamond halo frames the center stone, while baguette-cut and round brilliant-cut diamonds continue along the shoulders, creating a bold geometric presentation with brilliance from multiple angles. This item comes with a professional appraisal. Specifications Metal: Solid 18K White Gold Ring Size: 7 Total Item Weight: 7.65 Grams Country of Manufacture: USA Estimated Retail Replacement Value: $37,800.00 Reference Number: BEL21600 Item Number: FA205583002-BR6558ATZ Main Gemstone Gemstone: Natural Tanzanite Shape: Square Cut Quantity: 1 Carat Weight: 11.20 Carats Color Grade: Violetish Blue Clarity Grade: Type II Cut Grade: Very Good Diamond Accents Gemstone: Natural Diamond Shapes: Round Brilliant and Baguette Cut Quantity: 52 Total Carat Weight: 1.35 ctw Color Grade: H–I Clarity Grade: SI1–SI2 Total Gemstone Weight: 12.55 ctw Appraisal: Professional appraisal included

18k Gold 11.20ct Tanzanite & 1.35ctw Diamond Ring

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