Specification: Metal: 92.5 Sterling Silver, Character of the Main Stone: Natural Blue Iolite Stone-Its a substitute of Sapphire. Natural Iolite - Non-Heated | Non-Treated, also known as Water Sapphire Dimension: Iolite Oval Sizes: 4 X 3, 5 X 4 & 6 X 4 MM; Stone Weight: 15.40 CTs.; Earrings Weight: 19.750 Grams. Earrings is unique, Exquisite craftsmanship, beautiful design and high quality, perfect for any occasion. When you wear it, it promotes beauty, health, good luck, and healing. It is a great gift for your mom, wife, girlfriend, best friend, girls, or yourself on Christmas, Birthday, Anniversary, Mother's Day, Women's Day, Valentines Day, or just send as a surprise gift for that special one in your life. The Most Pleochroic Gemstone in Existence.