Vintage Navajo Belt Buckle set with Bisbee Turquoise Sterling

Vintage Navajo shadowbox belt buckle in sterling silver.It was once a bolo tie and someone converted it. The cutout design is a neck geometric pattern. It is set with a natural Bisbee turquoise stone with smoky matrix. The matrix has a hairline crack that does not compromise the integrity of the setting. 

It measures 2 1/2" by 2 1/8" wide. For a belt that is 1 3/4" wide. Weight: 39 grams. No hallmarks. Acid tested.