Adularia is a mineral that belongs to the feldspar group. It is also known as potassium feldspar or orthoclase. Adularia is typically white, gray, or pink in color and has a vitreous to pearly luster. It has a hardness of 6 on the Mohs scale and a specific gravity of 2.56 to 2.59. Adularia is found in many types of rocks, including granite, syenite, and diorite. Adularia is named after the Adula Mountains in Switzerland, where it was first discovered. It is commonly used as a gemstone and is sometimes used as a decorative stone in buildings and monuments. Adularia is also an important mineral in the production of ceramics, glass, and fertilizer.
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