This is a sparkling vintage ring that was made for Nida of Thailand. The ring has a polished onyx cab (1/2" x 5/16") that is set in sterling silver. The onxy is surrounded by two marcasite halos. I do not know the exact age of the ring other than it is from the 1950s or earlier (based on hallmark). The ring is in excellent condition, with no damage. It is marked 925 ND inside and tests positive for sterling silver. Size 6.
Size: 6 Bezel dimensions: 1" x 0.7" (2.5x1.8 cm) Weight: 0.32 oz (9.3 g) Shipping wt: 3 oz