What Is Andesite?

Category: Question and Answer Updated: 2023/6/20

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Andesite is a type of igneous rock that is formed by volcanic activity. It is usually dark grey or bown in colour. It usually exists as the solid form of volcanic lava or magma. The mineral composition of andesite includes biotite, pyroxene, or amphibole. It is known as a 'host rock' for the popular gemstone, Andesine.

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