These cufflinks are marked "Sterling" only, but are marked by the style of the Hopi tribe featuring silver overlay on an oxidized background.  Stylized Native American symbols form the decorative tops including turquoise inlay.  The backs have a swivel bar and also a hinge allowing them to move from side-to-side.  The tops measure 3/4" by 5/8".  SORRY, THIS ITEM HAS ALREADY BEEN SOLD!