Rainbow man pin by Leo Poblano c 1940's-50's, turquoise, m.o.p, spiny oyster and jet stone.~a larger pin than most of the others I have, and more intricate stone work, it's hard to see in these shots but the bezel and stones are really worn down on the hand tips and crown-this piece was loved/worn well by it's original owner.
In house relative here.*thanks to Toshio for helping me identify this!~his blog here, his (awesome) book here.