A rare mineral composed of calcium silicate hydrate, typically found as a secondary mineral in altered rocks.
From Greek gyros 'circle' plus -lite 'stone,' named for its curved or spiral crystal formations. The mineral was identified and named in the 19th century based on its distinctive structural appearance.
Gyrolite is a silent detective in geology—it forms under specific conditions of rock alteration and tells scientists about the temperature and chemistry of ancient mineral-forming environments.
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