This is a Beautiful Pair of Vintage Taxco Mexico Sterling Silver Stone Mosaic Earrings by Los Castillos. They are Screw on earrings.
They measure 1 1/8" x 1/2" .One is Signed Los Castillo Taxco with Eagle Mark(I think 15) , the other is signed Huecho en Mexico and is numbered. They are Nice Vintage, some wear low spots to mosaic.
Los Castillo Taxco Sterling Silver Mexican Mosaic Earrings