Help on my buckle?

Looking for information on the maker, possible value. Bought in Wisconsin at a resale shop. 3" ×2". Appear to be red coral and turquoise. Initials RHY or RMY? Thanks!

Whoops forgot pictures!

Maker is Richard Henry Yazzie. one that is nearly identical is on sale for $250 here. but another is available on ebay for $145. and a few others in the $125 range. So I would say, probable between $120-200 is realistic.