GIA Certified Unheated Blue Spinel Diamond Platinum Ring

A GIA-certified 1.66 carat natural blue spinel set in a platinum ring with a cushion-cut center stone framed by a diamond halo and diamond-set shoulders. GIA reports No Indications of Heating, meaning this is an untreated natural spinel, and designates the color as Blue with Transparent transparency. Natural unheated blue spinel is a desirable and increasingly collected colored gemstone, historically confused with sapphire. Please note that because the stone is mounted, the GIA report lists only two dimensions and states the depth is not measurable; the 1.66 carat weight is the actual stone weight. Buyers are encouraged to review all photos and the full GIA report carefully before purchasing.

• Species: Natural Spinel
• Weight (Spinel): 1.66 carats
• Shape: Cushion
• Cut Style: Brilliant Cut crown, Step Cut pavilion
• Measurements: 7.38 × 5.81 mm (depth not measurable due to mounting)
• Color: Blue
• Transparency: Transparent
• Treatment: No Indications of Heating
• Origin: Not requested
• Certification: GIA Spinel Report #5232901833 (verifiable at reportcheck.gia.edu)
• Metal: Platinum
• Setting Style: Cushion center stone with diamond halo and diamond-set shoulders
• Total Ring Weight: 3.99 grams (gross)
• Condition: Pre-owned; excellent overall condition; prongs intact; all diamonds appear present and secure; no visible damage