So much detail in this Stunning vintage Bolo Necklace has a glassy Black Anatase/Black Diamond Gemstone Statement center and tiny Amethysts dangle on 3 strands, also amethysts on with side of the centerpiece, the back is Ornate with a bow center wrapped in a tribal design this is all 925 Silver in Serpentine. The Maker’s Mark is “THAI 925 (and a maker’s initials in kanji)”