Bidspirit auction | Gold Ring with 3.51 ct

Gold Ring with 3.51 ct Natural Tanzanite – IGI Certified (Emerald Cut) A yellow-gold ring set with a single emerald-cut natural Tanzanite in a four-prong open-gallery mount. The stone is accompanied by an IGI Colored Stone Report (No. 563220543, dated January 17, 2023) identifying it as Natural Zoisite, variety Tanzanite, 3.51 carats, measuring 8.83 × 7.30 × 5.60 mm, bluish violet and transparent, with a natural inclusion pattern. The IGI report notes that Tanzanites are commonly heat-enhanced (typical for the variety) and indicates clarity enhancement, with a specific gravity of 3.35 and refractive index 1.691–1.700 consistent with Tanzanite. Condition: the stone shows natural inclusions visible to the eye; the gold mount is in good wearable condition. Metal purity is not stated on the certificate and would benefit from in-hand testing/hallmark verification. Tanzanite is a sought-after single-source gemstone (mined only in Tanzania), and an IGI-certified 3.51 ct emerald-cut stone in a gold mount is an attractive certified piece.