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An 18ct white gold Australian boulder opal and diamond pendant necklace, by Leisha Wheeler, the elongated pear-cabochon opal in rub-over open-back...

MURRLE BENNETT - an Art Nouveau 15ct gold opal openwork brooch, circa 1905, rub-over set with oval flat cabochon opals with floral design, signed ...

An early 20th century opal and diamond heart cluster drop pendant, circa 1910, centrally set with heart cabochon opal surrounded by rose-cut diamo...

A pair of opal and diamond flowerhead cluster drop earrings, with stud fittings, apparently unmarked, 30.4mm, 2.3g Earrings have been re-purposed...

A late 20th century opal and diamond oval cluster ring, centrally set with 2.4ct oval cabochon white opal surrounded by row of modern round brilli...

An Antique opal and diamond heart cluster pendant, set with heart cabochon opal, surrounded by rose-cut diamonds, apparently unmarked, 20.1mm, 1.9...

A sterling silver opal abstract pendant necklace, pendant 27.4mm, chain 44cm, 14.4g No damage or repair, only general surface wear

A modern 14ct gold solitaire opal ring, claw set with pear cabochon opal, opal measures approx 6.84 x 5.06 x 2.00mm, size N, 2g No damage, opal h...

A large late 20th century 9ct gold opal and garnet flowerhead cluster ring, maker OMJ, London 1974, set with cabochon opals and round-cut garnets,...

An early 20th century graduated five stone opal half hoop ring, set with oval cabochon opals, apparently unmarked settings test as 18ct, setting h...

A late 20th century 9ct gold opal drop pendant, maker HBJ, London 1979, rub-over set with oval cabochon opal, within foliate frame, 37.6mm, 6.6g ...

An early 20th century solitaire opal ring, claw set with 1ct oval cabochon opal, opal measures approx: 8.03 x 7.13 x 3.81mm, apparently unmarked, ...

A late 20th century 9ct gold three stone opal and diamond ring, maker P&RB, Birmingham 1980, claw set with oval cabochon opal and illusion set wit...

A late 20th century 9ct gold ruby and opal openwork pendant/brooch, maker PSR, London 1976, in the Victorian style, set with round-cut rubies and ...