Microcline,potassium aluminum silicate,is a member of a large group of minerals known as feldspars. Feldspars are perhaps the most common and abundant minerals on earth and occur in nearly all igneous and metamorphic rocks. Microcline has a triclinic structure,versus the more common orthoclase,a potassium feldspar with a monoclinic structure. Microcline is usually colorless and forms excellent crystals,such as the ones from Florissant and other localities in Colorado. A green form of microcline,called amazonite,is a popular gem material | |
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Credit: | Science Photo Library / Arem, Joel |
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