Vintage Navajo Womans Sterling Silver Two (2) Leaf and Four (4) Black Onyx Stone. Size 6. Cabochon size 1/4" long Oval Shape. Ring Size 1" tall by 1/2" wide. Have the other ring which is a mirror image of this one. I bought these items from Navajo Reservation 20 years ago, Never Worn. No Hallmark or Stamping.