HC Set: 4.1" Satin Spar Tower Selenite Spiral Natural Crystal Unicorn Horn Polished Mineral Stone - Morocco + One Polished Clear Quartz Cabochon (#2) You will receive exactly this Selenite Spiral - 104mm x 40mm x 37mm / 4 1/8 x 1 9/16 x 1 7/16 Inches; 190g / 6.7 oz (see photo, Stand and LED Light Base not included)! In additional, you will get one of the Clear Quartz Cabochon similar to the one in the listing, the size and the color of the cabochon may slightly vary as well due to the fact that all minerals are different. Approximately Size: 31mm x 21mm x 16mm / 1 1/4 x 13/16 x 5/8 Inches; Approximately Weight: 12-22gr / 0.4-0.8 oz. Selenite (Gypsum) is an evaporite mineral most commonly found in layered sedimentary deposits in association with halite, anhydrite, sulfur, calcite and dolomite. Gypsum (CaSO4.2H2O) is very similar to Anhydrite (CaSO4). The chemical difference is that gypsum contains two waters and anhydrite is without water. Gypsum is the most common sulfate mineral. Selenite is named after the Greek goddess of the moon, Selene. Chemical Composition: CaSO42H2O; Category: Sulfate mineral; Mohs scale hardness: 2; Color: White; Selenite is the colorless and transparent variety that shows a pearl like luster. Crystals are common and most often assume a tabular habit. "Satin Spar" comes from compact fibrous aggregate veins. This variety has a very satin like look that gives these crystals a play of light. Long thin crystals show bends and some specimens bend into spirals called "Ram's Horn Selenite". (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.)