Chrysocolla Ring in Sterling Silver Mexico Size 7

Vintage Mexican sterling silver ring set with a bright teal chrysocolla stone. It is not stabilized and has hairline surface cracks that were always present, but there is a chip. Today., those would have been filled with resin. This one has some old silver polish in the indentation. 

Size 7. The face of the ring measures 7/8" long and the ring stands up 10 mm from the finger. Marked 925 inside the band.