This Art Deco era circular pendant by Ostby & Barton Co. is a conversion from a stick pin and features a button shaped black onyx disc with a center diamond, which is set in platinum, all framed in a 14k gold back.  **Available with a gold filled cable chain, choose from options above 

Measurements: weight 1.1 grams, width 11mm, diamond 2.5mm 

Condition: great antique condition with light wear

Markings: marked as shown

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