Sterling Silver and 22 K Gold Vermeil Moonstone Pear Drop EarringsMaterial: Genuine 22 K Gold Vermeil and Sterling Silver (92. 5% silver content) Stone(s): Genuine moonstone (13 x 10 mm) Overall Dimension of Each (including hooks): 1. 9 x 0. 8 x 0. 3 inches Back Type: Hook Weight: 7. 7 grams Stamp Mark: N A Serial Number: e23384 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