Gypsum is a type of rock forming mineral that produces massive beds. It is usually from precipitation out of highly saline water. While most of other minerals when rehydrated simply form liquid or semi-liquid pastes, or remain powdery, calcined gypsum quickly reverts chemically to the preferred dehydrate form, while physically form a rigid and relatively strong gypsum crystal lattice. Therefore, it can be cast into various shapes such as sheets, sticks, and molds.
Selenite is a form of gypsum. It is colorless and transparent variety that shows a pearl like luster. The word selenite itself means a moon like glow in Greek.
The item is very dazzling. The crystals are fan shaped and the color of specimen is deep golden. It is about 4.75 X 3.75 inches and weights about 7.9 oz.