This pretty Mid Century Modernist brooch or fashion pin has a sort of winged marquise shape. I believe it's all shell (no metal other than the clasp), with colorful swirled abalone at the center framed in two curved, 3 sided mother-of-pearl wings. The back appears to be cowrie shell - it looks black in my picture but it's actually a mottled dark brown and reddish amber color. The unsigned pin is 3 by 1 inches and in excellent condition with no damage.