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AN ART DECO DIAMOND AND BLACK ONYX BAR BROOCH
Designed as a single and old European-cut diamond and carved black onyx bar, centering upon an old European-cut diamond, accented by old European-cut diamond terminals, mounted in platinum, circa 1920, with French assay marks
Designed as a single and old European-cut diamond and carved black onyx bar, centering upon an old European-cut diamond, accented by old European-cut diamond terminals, mounted in platinum, circa 1920, with French assay marks