Vintage Sterling Silver 1.76ct Black Star Sapphire & Quartz Ring, Size 7.5

This vintage ring features a 1.76-carat black star sapphire set in sterling silver, sized 7.5. Black star sapphires display a characteristic asterism—a four- or six-rayed star effect visible when light reflects across the stone's surface, caused by rutile needle inclusions aligned within the crystal structure. The ring appears to incorporate quartz as noted in the listing title, though the primary gemstone is the sapphire. No treatment information or gemological certification details were provided with this listing.