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| A gentleman's opal and diamond dress set by Van Cleef & Arpels, 1920's. |
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| A set of gold and opal jewelry, including a ring, brooch and chain necklace. |
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| A gold and opal buckle by Jules Wièse, second half of the 19th century. |
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| A gold, tortoiseshell, opal and enamel hair comb by Georges Fouquet, France, 1905-1908. |
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| A magnificent black opal, gold and enamel brooch by Louis Comfort Tiffany, circa 1910. |
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| A gold, opal, and enamel sautoir necklace by Marcus & Co., circa 1900. |
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| A gold, opal, diamond and plique-a-jour enamel bracelet by Eugène Feuillâtre, circa 1905 |
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| A black opal and colored stone ring by John Hardy. |
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| A black opal, diamond and emerald ring by Katherine Jetter. |
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| A late 19th century opal and diamond brooch, and a diamond winged brooch. |
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| An opal and aquamarine pendant necklace by Greg Scully. |
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| An opal and diamond bracelet, circa 1910. |
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| An opal and diamond bracelet, circa 1910. |
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| An opal and diamond brooch, circa 1910, formerly belonging to Princess Ceril Birabongse of Siam (Thailand). |
