Sanidine is a type of feldspar mineral that is commonly found in volcanic rocks. It is known for its distinct pink, white, or grey coloration and is often used as a gemstone or in the production of ceramics and glass. Synonyms for the mineral include alkali feldspar and potassic feldspar. Some other lesser-known synonyms for sanidine include adularia, perthite, and orthoclase. These three minerals are all part of the larger feldspar family and share many similar physical and chemical properties. Adularia is often used to refer specifically to sanidine from the Swiss Alps region, while perthite and orthoclase refer to certain variations of feldspar with unique color patterns and compositions.