For sale is this authentic pre-owned luxurious MAZ modernist graduated natural black Onyx ring crafted of 14k solid fine yellow gold by Mazza Co.. The Mazza Company creates their own unique collections using hand carved gemstones and other special gems in the family tradition. The Mazza Company, the formerly unknown supplier of gemstones for many famous jewelry houses has now emerged as a leading creator of 14kt and 18kt fine fashion jewelry. Stamped 14k & MAZ makers mark. Circa 1960's-70's. Will make a handsome addition to any jewelry collection and wardrobe. Weight - 4.0 grams Size - 6-1/4