AN ART DECO BLACK ONYX, DIAMOND AND CORAL FIBULA PIN

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AN ART DECO BLACK ONYX, DIAMOND AND CORAL FIBULA PIN

The black onyx open ring applied with cabochon red coral and pavé-set diamond geometric detail to the pavé-set diamond, black onyx and red coral stylised arrowhead terminal, mounted in platinum, circa 1925 (black onyx with one small conchoidal fracture) with French assay marks