Pseudohexagonal tabulate crystals are as in this specimen are rare. (Fe,Mg,Mn)Al2(SiO4)O(OH)2 Chloritoid forms small green platy to micaceous grains in rocks that have been subjected to moderate grades of regional metamorphism and by hydrothermal alteration.
Dimensions (millimeters): 25 x 25 x 7
Dimensions (inches): 1 x 1 x .28
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