Diogenites consist mostly of magnesium-rich orthopyroxene, with smaller amounts of olivine and plagioclase. The pyroxene is often in the form of sizeable crystals, indicating that it cooled slowly, presumably within magma chambers deep within the crust of Vesta.
The Tatahouine meteorite, a unique diogenite that fell in small fragments Tunisia in 1931, is famous for its green, centimeter-sized pyroxene crystals.
Related category METEORS AND METEORITES
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