Measures approx. 1"W x 3/4"T 3/16"H 3.16cttw 2mm Shank Precious 925 Sterling Silver Size 10 Ring Natural Genuine Perfectly matched exotic genuine Apatite. This ring is a stunning neon blue, naturally mined that way. Rare because this color with the neon light is mined-out and mostly gone from the planet. Apatite is one of the few minerals produced and used as biological micro-environmental systems. It's suitable for handling. Suitable for display on your finger in any light. Because of the rarity now of this Blue, it is Relatively Expensive. Get it now and make this a family heirloom.