RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA / SCIENCE PHOTO LIBRARY RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA / SCIENCE PHOTO LIBRARY
Orthoclase crystals. Orthoclase, or adularia, (potassium aluminium silicate) is a type of feldspar, and a major granite-forming mineral. Orthoclase is used the manufacture of some glasses and ceramics, such as porcelain, and in scouring powder.
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