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AN ARTS AND CRAFTS OPAL AND DEMANTOID GARNET BROOCH. Probably England ca 1910. 15K gold. Length 38 mm.

18 Karat Gold, Platinum, Opal, Sapphire, and Garnet Brooch, Louis Comfort Tiffany, Circa 1920.

Tiffany & Co black opal, demantoid garnet and sapphire necklace, with a square cut green sapphire drop and a gold filigree frame, c1910 (Christie's)

opals, diamonds, ruby.

Rare Antique Opal Diamond Turtle Pin:

An opal and diamond pansy brooch, circa 1905 The opal finely carved to depict a pansy in bloom, centrally-set with an old brilliant-cut diamond, to a scrolling openwork surround millegrain-set with similarly-cut diamonds, diamonds approx. 0.90ct total, numbered, length 4.0cm

Old Ring Marquise Art Nouveau.

OPAL AND DIAMOND BROOCH, SET WITH A BATON SHAPED OPAL WITHIN A SCROLLING DIAMOND SET SURROUND, CIRCA 1890,

A diamond, platinum and gold 'stomacher' brooch, circa 1890-1900. In the garland style composed of two large foliated arabesque, suspending three wreaths in between, set throughout with diamonds, mounted in platinum and gold.