Lot 668 , An attractive Art Deco black opal and diamond ring, circa 1920

An attractive Art Deco black opal and diamond ring, circa 1920, collet-set with an oval cabochon black opal measuring approximately 19.9 x 8.2 x 3.8mm, to shoulders accented with rose-cut diamonds, mounted in platinum, size M, stamped PLAT, numbered A47611, gross weight approximately 4 grams
£300-500