This is a natural turquoise ring in a sterling silver setting. This turquoise was mined at the Cripple Creek mine in Colorado, and is a natural piece of turquoise. Daniel Zender is the artist. He has been making and selling jewelry for almost 50 years. this ring is a size 8, and can be sized. These rings are all one of a kind. Measures at 3mm x 3mm Turquoise measures at 1 1/2mm wide and just under 2mm long.