Onyx and diamond brooch, Chaumet, circa 1925

Of rectangular shape with stylized open work buckle motifs, set with cushion-shaped and single-cut diamonds and polished onyx, mounted in platinum, maker's marks for Chaumet partially rubbed, French assay marks, two small diamonds deficient.

Stamped with French assay mark for platinum. Maker's mark for Chaumet partially rubbed. Diamonds estimated to weigh a total of approximately 4.00 carats, H-I colour, VS-SI clarity, as gauged and graded in mounting. Some soldering marks to the reverse but not apparent when worn. Signs of normal wear to the metal, scratches consistent with use, two small diamonds deficient, in good condition.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Please note that colour, clarity and weight of gemstones are statements of opinion only and not statements of fact by Sotheby's. We do not guarantee, and are not responsible for any certificate from a gemological laboratory that may accompany the property. We do not guarantee that watches are in working order. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue, in particular to the Notice regarding the treatment and condition of gemstones and to the Notice regarding import of Burmese jadeite and rubies into the US.
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