Sulfates are oxygen and sulfur compounded with one or more metals. There are over 150 named varieties, due to the number of possible combinations. Gypsum is the most common. The distinct varieties are alabaster, selenite, and satinspar. Gyppsum is used in plaster of Paris.
Anhydrite is less common than gypsum. It is associated with salt beds and has a pearly luster. It takes up water and converts to gypsum.
Epsomite is common as epsom salts. It is found in mineral waters and deposits, and contains cobalt, zinc, manganese and nickel.Now to the metaphysical Adularia is called the stone of the Goddess. It is a form of moonstone that can be faceted. It is clear with a beautiful iridescence, and is quite rare Many of the deposits in Sri Lanka have been depletes. Some has been found in the Austrian alps. It is valued as a means of inward journeying and symbolizes tranquility.