Satin spar selenite rulers are shaped much like a ruler and they are cut at either end. Each bag includes 5 rulers at varying lengths. Selenite is named after the Greek word for moon, contrary to popular belief, it contains no significant selenium. Satin Spar selenite is a form of fibrous and crystallized gypsum. Other varieties include alabaster, selenite, desert rose and gypsum flower, gypsum rock, ram horn and sand gypsum. It is common to refer to satin spar as selenite. As a healing stone, this mineral is commonly used to charge or cleanse crystals. It is said to help regenerate the cellular structure and has been used to correct skeletal disorders and to promote flexibility. Selenite also provides clarity of mind, expanding awareness.