AN ART DECO DIAMOND AND ONYX PENDANT AND CHAIN, EARLY 20TH CENTURY the pendant set with a pear shaped old cut diamond of 1.01 carats, suspended within a tapering octagonal halo set with polished pieces of onyx and single cut diamonds, accented by foliate motifs above, set with old cut and single cut diamonds, and a carved melon shaped piece of black onyx, on a fancy link chain, the pendant unmarked, the chain with obscured French assay marks, pendant 6.1cm, chain 43.0cm, 12.4g.