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antique, art deco? tri color gold, black onyx Toni1969
2.5 inches Vintage  Sterling Silver Scorpion + Black Onyx pendant by southcop
Vintage earringsby Antique…
Sterling Silver Onyx Broochby DrFluffy
Vintage Deco Onyx Filigree Binder Brothers Earring Necklace Sterling Set Demi Parure by Moonsto…
Brooch for WOMEN- Sterling & Onyx - Marked GERMANYby BHock45
Genuine Green Onyx with Mexico Sterlingby LaCours…
My grandmothers (possibly great-grandmothers) Onyx-Diamond Ring & Pendantby ginnymac3
braclettby huey
Onyx and Marcasite Broochby vintage…
Necklace,Bracelet,Earring michelle34
Large Onyx Crossby SantaRosaOnyx
Vintage "Black Onyx" Rings from the 1950'sby bahamaboy
Vintage Tiffany Earringsby Siouxdahlem
A  bracelet present to my mother in ?????by suziq11
Green Onyx Art Deco/Nouveau Necklaceby TamaraB