Art Nouveau 14kt “Lightning Ridge” Black Opal & Enamel Ring 1980 " and a "STERLING" purity

" and a "STERLING" purity mark

Each bead varies slightly in size

75ctw in beautiful H color and VS2 clarity

A bold Mexican opal ring from the Vintage (ca1960s) era

measures approximately 1" long and is 5/8" thick

Art Nouveau 14kt “Lightning Ridge” Black Opal & Enamel Ring 1980 " and a "STERLING" purityBlack opals are among the most rare and valuable of all natural opal varieties. This opals ring from the early 1900s has a 10+ct Black Opal with colors to match the finest to ever come out of Australia. Unlike their common opal counterparts, they have a dark canvas and radiate brilliant flashes of colors due to their subtle iron oxide and carbon properties. Although a portion of the world's opals are mined in Ethiopa, most originate in Australia