Mid-Century Modern Purple Amethyst Ring Size 6

Vintage Mid-Century Modern sterling silver ring with two raindrops and a purple amethyst cabochon stone. Cracky looking marks that you see are on the silver behind the stone. Stone is so clean that you can see right through it. 

Size 6. Face measures 1 1/8" by 3/4". Weight: 11.1 grams. Tarnished. No hallamrks.