I'm not entirely sure what makes this the "rarest" Art Deco opal and diamond ring instead of just a "rare" Art Deco opal and diamond ring, but it's so pretty I don't care. (The superlative comes straight from the TMW Jewels listing.
A trio of glistening opals, displaying a complete palette of bright pastel colours, alternate with a vertical row of four sparkling old-cut diamonds in this superb British three-stone ring, circa late-nineteenth century.
A gorgeous antique opal ring from the first decade of the twentieth century is finely crafted in two-tone white and yellow gold flourished with scrolling foliate motifs primped with eight round cut diamonds. The dreamy carat elongated oval opal caboc