GIA Certified Unheated Montana Yogo Gulch Sapphire Diamond 18K Gold Ring

A GIA-certified 0.88 carat natural unheated sapphire of USA (Yogo Gulch) origin, set in an 18K gold ring with an oval center stone framed by a starburst cluster of round brilliant diamonds. GIA reports No Indications of Heating, meaning this is an untreated natural sapphire, and confirms the geographic origin as Yogo Gulch, Montana. Yogo sapphires are among the most sought-after American gemstones, prized for their naturally saturated cornflower blue color and for being untreated, which makes a GIA-certified unheated Yogo a rare and collectible stone. GIA designates the color as Blue with Transparent transparency. Buyers are encouraged to review all photos and the full GIA report carefully before purchasing.

• Species: Natural Corundum
• Variety: Natural Sapphire
• Weight (Sapphire): 0.88 carats
• Shape: Oval
• Cut Style: Brilliant Cut crown, Step Cut pavilion
• Measurements: 6.67 × 5.99 × 2.66 mm
• Color: Blue
• Transparency: Transparent
• Treatment: No Indications of Heating
• Origin: USA (Yogo Gulch, Montana)
• Certification: GIA Sapphire Origin Report #2235897671 (verifiable at reportcheck.gia.edu)
• Metal: 18K Gold
• Setting Style: Oval center stone with starburst round brilliant diamond cluster
• Total Ring Weight: 5.10 grams (gross)
• Condition: Pre-owned; excellent overall condition; prongs intact; all diamonds appear present and secure; no visible damage