[Brand] TIFFANY & CO. [Condition] B [Material] SV925 / 18K [Size] Size 13 [Ring Width] Approximately 4mm [Ring Inner Diameter] Approximately 17mm [Ring Inner Circumference] Approximately 53.4mm [Other Sizes] Bezel Size: Approximately 20mm long, 20mm wide / Center Stone Size: Approximately 9mm long, 9mm wide [Weight] Approximately 12.9g [Accessories] None An onyx ring from Tiffany. The two-layer construction, with the jet-black onyx embraced by an 18K bezel and a base of sterling silver, beautifully highlights the contrast of color and texture. As indicated by the "925" and "750" hallmarks, this ring is crafted from a combination of silver and 18K gold. Tiffany transitioned from 14K to 18K gold for jewelry around 1990, and from the early 1980s to the 1990s, many designs featured stones set in gold on silver shanks. This piece is also in that lineage, and the cool luster of silver, the warmth of 18K gold, and the depth of the onyx create a gentle shadow on the finger. It is a vintage Tiffany combination ring that adds a subtle light to everyday styling. RI36111101 #SIGNETRO