Art Nouveau Platinum Opal and Diamond Filigree Ring Round which have an approximately total

which have an approximately total weight of 1

there is no apparent damage to the gold and silver setting or to the diamond

Measurements: The horseshoe measures 1 1/4" tall

The crown is marked "PATENT OYSTER"

there is no apparent damage to the gold setting or to the enamel detail

Art Nouveau Platinum Opal and Diamond Filigree Ring Round which have an approximately totalA lovely opal and diamond filigree ring from the Art Nouveau (ca1910) era! Crafted in platinum, the ring holds a beautiful boulder opal cabochon at the center of a filigree mounting. The striking opal is an Australian ironstone boulder opal, showing beautiful blue and green flashes contrasted against a dark brown host rock. Four old mine cut diamonds decorate the fine filigree wirework border in bead settings, adding a gorgeous sparkle to the design!