Vintage Black Blue White Geometric Brooch Pin Copper Asymmetric Square

Vintage brooch / pin What I know about it: gifted to a family member in the early 1960's from a relative in Albuquerque, New Mexico that purchased it from a local Native American craftsman. Black and blue raised geometric pattern on a white with speckled black background Appears to be some sort of enamel on copper .... not sure The original pin has been replaced at some time over the years It is a bit asymmetrical 1 - 7/8" x 1- 1/4" x 1- 3/8" x 1 3/8" No chips Great piece that needs a home where it can be appreciated