18K Gold 4.05ct Tanzanite & 1.05ct Diamond Ring
Updated September 6, 2026
| Lot number | 308 |
| Estimate | 11,000.00 - 22,000.00 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 4.05ct Tanzanite and 1.05ctw Diamond Ring <br> <br> <br> An impressive gemstone ring crafted in solid 18K white gold, featuring a 4.05-carat natural cushion-cut tanzanite surrounded by approximately 1.05 carats of natural diamonds. <br> <br> <br> The center tanzanite displays a vivid violetish-blue color and is secured in a four-prong setting. A halo of round brilliant-cut diamonds frames the center stone, while baguette and round brilliant-cut diamonds continue along the shoulders for added brilliance and dimension. The elevated open gallery allows light to enter beneath the gemstones and highlights the ring’s detailed construction. <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: 7.50 <br> Total Item Weight: 5.75 Grams <br> Country of Manufacture: USA <br> Estimated Retail Replacement Value: $22,000.00 <br> Reference Number: WAG8800 <br> <br> <br> Main Gemstone <br> <br> <br> Gemstone: Natural Tanzanite <br> Shape: Cushion Cut <br> Quantity: 1 <br> Carat Weight: 4.05 Carats <br> Color Grade: Violetish Blue <br> Clarity Grade: Type I - Eye Clean <br> Cut Grade: Very Good <br> <br> <br> Diamond Accents <br> <br> <br> Gemstone: Natural Diamond <br> Shapes: Baguette and Round Brilliant Cut <br> Total Carat Weight: 1.05 ctw <br> Color Grade: G–H <br> Clarity Grade: SI1–SI2 <br> <br> <br> Total Gemstone Weight: 5.10 ctw <br> <br> <br> Appraisal: Professional appraisal included
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