Sure to be a conversation piece, this pin is circa 1970-1980. Hand-crafted, this pin is contemporary-style at its finest. 18K yellow gold swirls free-form and is accented with gold beading and raised lines. The focal point is a half-circle onyx piece with gold beading. The piece is marked SWISS 18K and a makers mark that appears to be a snake but not sure. The pin weighs 11.3 dwt and is 1-3/4” across and 1-1/2 across.