ORTHOCLASE FELDSPAR SPECIMENS

Orthoclase is a feldspar mineral with the chemical formula KAlSi₃O₈ and has a hardness of 6-6.5 on the Mohs hardness scale. It is considered a key component in many igneous rock formations and is the most abundant mineral group throughout the continental crust. It can form individual crystals, but it's most commonly known for its pink coloration within granite rock. It has many commercial uses, including application in the production of a wide variety of ceramics, and is sometimes used in glass manufacture.