Home > Pseudomorphs – March 3 > MS1515 Chamosite after Almandine

Chamosite after Almandine - Sold

These pseudomorphs consists of an iron rich chlorite group mineral, namely chamosite, which has replaced the iron aluminum garnet almandine. These form via retrograde processes following high grade regional metamorphism of a banded iron formation through garnet facies.

This specimen consists of green chamosite-greenalite matrix hosting a single crystal of chamosite after almnadine, 4.2 by 2.5 by 2.2 cm. The distortion of the original almandine crystal from equidimensional proportions stems from the regional metamorphic process, i.e. folding, that formed the original garnet crystal. Interesting, the crystal edges are also curved.