A black opal and diamond cluster ring, mid 20th century, col...

A black opal and diamond cluster ring, mid 20th century, collet-set with a cabochon opal measuring 7.5 x 5.3 x 2.6mm, within a border of single-cut diamonds totalling approximately 0.20 carats, mounted in platinum, size F1/2, stamped PLAT, gross weight approximately 3.5 grams

Estimate:£150

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