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October 3, 2011
Geology Word of the Week: R is for Rutile
def. Rutile: A high-pressure, high-temperature mineral that is the most common form of titanium oxide (TiO2). Rutile is commonly found in metamorphic rocks, such as eclogite. Rutile is also found as an accessory mineral in igneous rocks, particularly in deeper-formed plutonic igneous rocks and also volcanic rocks with deep sources, such as kimberlites. Rutile is an important economic mineral that is mined for titanium. Rutile often forms as thin, needle-like …