You will get 5pcs of the Peach Moonstone Rough Stones similar to the ones in the listing, the size and the color of the stones may slightly vary as well due to the fact that all minerals are different. Average 1pc weight: 7-16g / 0.25-0.5oz; Average 1pc size: 28 x 19 x 10 mm / 1 1/8 x 3/4 x 3/8 Inches; (see photo, the photos are taken under bright light, some photos are taken WET)! Moonstone is the most well-known gemstone variety of orthoclase feldspar, a potassium aluminum silicate. It is a transparent to opaque oligoclase, a variety of plagioclase albite and sheet mica. Moonstone is known to exhibit a distinct sheen under certain lighting conditions, and it is the sheen which renders moonstone one of the most remarkable gemstones. The optical effect of adularescence is a result of moonstone's unique structural pattern. Tiny inclusions of albite, a sodium aluminum silicate are intermixed with host rock layers of orthoclase, a potassium aluminum silicate. As light enters the stone, it is refracted and scattered, producing an extremely unique and attractive play of both color and light. With moonstone, the aura of light actually appears to glow from deep within the surface of the stone. Chemical Formula: KalSi3O8, Potassium aluminum silicate; Hardness: 6 to 6.5 on the Mohs scale; Color: Colorless, yellow, pale sheen, peach, orange; (The above information is provided solely for informational purpose. Kindly note that all stones are offered for decorative purposes only. Please, handle your stones with great care, do not grind or crumble them, do not dip or add them into your food or drink, do not use any parts of them in any elixirs, potions, lotions etc. Always make sure you wash your hands before and after working with your crystals.) All our minerals and crystals are carefully measured with digital measuring instruments that provide the high accuracy of numbers/values!