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Mar 15, 2019 · Augite is a mineral of interest to geologists, and collectors. While it has little to no industrial value, the presence and development of augite may help tell scientists and geologists about Earth’s history in certain regions. Distribution. Widespread; only a few classic localities, much studied or providing. From Arendal, Norway.
Formula: (CaxMgyFez) (Mgy1Fez1)Si2O6. Where 0.4 ≤ x ≤ 0.9, x+y+z=1 and y1+z1=1. This formula is based on the definition by Morimoto et al. (1988) Colour: Brown-green, black, green-black, brown, purplish brown. Lustre: Vitreous. Hardness: 5½ - 6. Specific Gravity: 3.19 - 3.56. Crystal System: Monoclinic. Member of:
Augite, the most common pyroxene mineral (a silicate of calcium, magnesium, iron, titanium, and aluminum). It occurs chiefly as thick, tabular crystals in basalts, gabbros, andesites, and various other dark-coloured igneous rocks. It also is a common constituent of lunar basalts and meteorites rich.
Because its chemical structure is highly variable, augite might be considered by some to be its own group of minerals rather than an individual mineral. It is also known for its remarkable luster (shine off of a reflective surface). Uses. Augite is a mineral of interest to geologists, and collectors.
Augite. Augite is a clinopyroxene, part of a solid solution series. It is an intermediate member of diopside and hedenbergite. Vitreous, translucent. Black to dark green in hand sample. Usually colorless, tan-gray, pale green, pale brown or brownish green in thin section. May be zoned.
Augite is a very common rock-forming mineral that gives black color to many igneous rocks. This mineral belongs to a group of silicate minerals known as pyroxenes. By the way, ‘pyroxene’ comes from the Greek language and means that these minerals have nothing to do with fire (i.e. igneous processes).
Augite is a basic silicate mineral with high content of iron and magnesium, a so-called "ferromagnesian" mineral of the pyroxene grouping. This identifies it as a high-crystallization-temperature dark silicate, formed at early stages of the Bowen reaction series .
