Vintage Silver Malachite & Onyx Art Deco Cufflinks

A beautiful pair of American vintage Silver, Onyx and Malachite Art Deco style cufflinks, comprising of square panel (15mm X 15mm) inset with a green Malachite center with black Onyx border. Silver swivel counterparts. Stamped STERLING with GF MW (Great Falls Metal Works) makers mark. Circa 1970. Great Falls has been a leader in environmentally friendly jewellery making since the 1970's.