Bold Sterling Silver Glowing Fire Faceted Moonstone Ring (Size 7.5)Material: Genuine Sterling Silver (925 silver, 92. 5% silver content) Stone(s): Genuine faceted fire moonstone Ring Face Dimension: 1. 2 x 0. 5 x 0. 25 inches Weight: 17 grams Ring Size (US): 7. 5 Stamp Mark: 925 Serial Number: r26723 Moonstone is a variety of orthoclase, a feldspar. It often has a sky blue opalescent sheen, also called schiller or fire, making the stone look as if it is glowing. The sheen is created by thin layering of orthoclase