Pyroxene is a group of important rock-forming silicate minerals commonly found in igneous and metamorphic rocks. They typically exhibit a single chain structure of silicon-oxygen tetrahedra and are characterized by their dark color, two directions of cleavage at nearly 90 degrees, and high density. This mineral group plays a vital role in the classification of igneous rocks and understanding metamorphic conditions, as it provides insights into the mineral composition and the processes that formed these rocks.
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