18K Gold 1.87ct Tanzanite & 0.48ct Diamond Ring
Updated August 29, 2026
| Lot number | 192 |
| Estimate | 1,032.00 - 2,064.00 USD |
| Category | Jewelry & Watches |
| Auction | Exceptional Estate Treasures – Rolex, Jewelry, Art & Collect |
| Date | September 4, 2026 at 8:59 PM PDT |
| Auction house | A&B Gemological Services |
| Location | Los Angeles, California |
18K White Gold 1.87ct Tanzanite, Sapphire and 0.48ctw Diamond Ring <br> <br> <br> A striking gemstone ring crafted in solid 18K white gold, featuring a 1.87-carat natural cushion-cut tanzanite accented by natural sapphires and approximately 0.48 carat of natural diamonds. <br> <br> <br> The center tanzanite displays a vivid violetish-blue color and is secured in a prominent prong setting. Six navy-blue sapphires frame the center stone, while a halo of round brilliant-cut diamonds and additional diamond accents along the shoulders add brilliance and dimension. <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 <br> Total Item Weight: 4.27 Grams <br> Country of Manufacture: USA <br> Estimated Retail Replacement Value: $4,127.00 <br> Reference Number: BEL3668 <br> Item Number: BR7342ATZ <br> <br> <br> Tanzanite Details <br> <br> <br> Gemstone: Natural Tanzanite <br> Shape: Cushion Cut <br> Quantity: 1 <br> Carat Weight: 1.87 Carats <br> Color Grade: Violetish Blue <br> Clarity Grade: Type I, Eye Clean <br> Cut Grade: Very Good <br> Treatment: Heated <br> <br> <br> Sapphire Details <br> <br> <br> Gemstone: Natural Sapphire <br> Shape: Round Brilliant Cut <br> Quantity: 6 <br> Total Carat Weight: 0.22 ctw <br> Color Grade: Navy Blue <br> Clarity Grade: Type II, Translucent <br> Cut Grade: Very Good <br> Treatment: Heated and Diffusion Treated <br> <br> <br> Diamond Details <br> <br> <br> Gemstone: Natural Diamond <br> Shape: Round Brilliant Cut <br> Total Carat Weight: 0.48 ctw <br> Color Grade: G–H <br> Clarity Grade: SI1–SI2 <br> Cut Grade: Very Good <br> Treatment: None <br> <br> <br> Total Gemstone Weight: 2.57 ctw <br> <br> <br> Appraisal: Professional appraisal included
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