Sterling Silver 24ct. Natural Rainbow Moonstone Faceted Pendant 50mm in Length by 18mm in width, 8 grams. The Large Moonstone is 18mm in diameter. Total carat weight is 20. Natural Moonstone Gemstones with two faceted moonstones. Handmade, Polished Finish, Excellent Quality, Meticulous Detail. Natural, Untreated Gemstones.