A green silicate mineral, a hydrated iron silicate found in iron ore deposits.
From green plus the mineral suffix -alite (from Greek allos, other). Named for its distinctive green color and silicate mineral composition, identified in the 19th century.
Greenalite is one of the key minerals in banded iron formations—the ancient rocks that contain almost all of Earth's minable iron ore and record oxygen's appearance in our atmosphere 2.4 billion years ago!
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