Art retailer Deco Style Earrings, Silver Marcasite Onyx, Sterling and 18K Gold

These sterling silver earrings are in the Art Deco style with small marcasite stones and a oval onyx. The top of the drop section has am 18K round inset. They measure 1.75" or 4.5 cm in total length. Both are hall marked with 18K for the gold and 925 for the silver content. There is a makers mark in the shape of an open or broken triangle. I have been unable to identify the mark.

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