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An Edwardian opal and diamond brooch - Bentley & Skinner

An Edwardian opal and diamond brooch. An Edwardian opal and diamond brooch, the oval cabochon-cut opal measuring approximately x yellow gold claw-set to the centre of an old-cut diamond.

Opal and diamond brooch pendant, circa 1915, centring on a round cabochon opal weighing approximately 9.50 carats within an openwork frame highlighted by old European cut diamond set foliate motifs, mounted in 15ct gold and platinum.

OPAL AND DIAMOND BROOCH PENDANT, CIRCA 1915 Centring on a round cabochon opal weighing approximately carats within an openwork frame highlighted by old European cut diamond set foliate motifs, mounted in gold and platinum.

An opal and diamond brooch/pendant, circa 1890.  The openwork cartouche of ribbon and floral design, set throughout with cushion-shaped, old brilliant and single-cut diamonds, and to the centre with a heart-shaped cabochon opal, suspending an opal drop, diamonds approx. 1.20cts total, later detachable brooch fitting,

An opal & diamond brooch/pendant, circa Openwork cartouche ribbon & floral design, set throughout with cushion-shaped brilliant & single-cut diamonds, framing a heart-shaped cabochon opal, with suspended opal drop

Victorian-Inspired-4-80ctw-Rose-Cut-Diamond-amp-Ruby-Brooch-Cum-Pendant

Victorian Inspired 4.80ctw Rose Cut Diamond & Ruby Brooch Cum Pendant

Victorian-Inspired-4-80ctw-Rose-Cut-Diamond-amp-Ruby-Brooch-Cum-Pendant

A turquoise and diamond brooch, Van Cleef & Arpels

A turquoise and diamond brooch, Van Cleef & Arpels designed as a oval turquoise cabochon cluster, enhanced by circular-cut diamonds; signed Van Cleef & Arpels, NY, no. mounted in eighteen karat gold;

Opal, Diamond and Platinum Clip Brooch, circa 1930

Opal, Diamond & Platinum Clip Brooch, ca Fashioned as a ribbon bow with flaring tails set with old mine-cut diamonds & decorated with round opals, mounted in platinum.

Image result for opal jewelry #GemstoneBrooches

Image result for opal jewelry #GemstoneBrooches

*Edwardian Opal Diamond Pendant, Edwardian 14 karat yellow gold and sterling silver opal and diamond pendant.

Edwardian Opal Diamond Pendant

*Edwardian Opal Diamond Pendant, Edwardian 14 karat yellow gold and sterling silver opal and diamond pendant.

An antique sapphire and diamond brooch, late 19th century. Designed as a sunburst mounted en tremblant, set with a cushion-shaped sapphire weighing 12.96 carats and cushion-shaped, circular-cut and rose diamonds, brooch fitting detachable.

An antique opal and diamond brooch, late century. Designed as a sunburst mounted en tremblant, set with a cushion-shaped opal weighing carats and cushion-shaped, circular-cut and rose diamonds, brooch fitting detachable.

An opal and diamond brooch/pendant, circa 1900. |  © Bonhams 2001-2015

An opal and diamond brooch/pendant, circa the central opal cabochon, to an openwork cartouche-shaped border of scrolling flowers and foliage set with old brilliant and single-cut diamonds, width

Edwardian Opal and Diamond Necklace, A lovely 5.50 carat oval white opal cabochon is framed by garlands and floral motifs set with old mine cut diamonds in platinum over 18 karat yellow gold. This Edwardian gem is show on a platinum 18 inch diamond set chain. by wteresa

Edwardian Opal and Diamond Necklace, A lovely carat oval white opal cabochon is framed by garlands and floral motifs set with old mine cut diamonds in platinum over 18 karat yellow gold. This Edwardian gem is show on a platinum 18 inch diamond set chain.

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