Min. [f. as prec. + -OID. Named by Rose, 1837, from its resemblance to chlorite.] A foliated hydrous silicate of alumina and iron, varying in color from greenish black to gray; also called chlorite spar.
1844. in Dana, Min., 523.
1873. Proc. Amer. Phil. Soc., XIII. 399. Chloritoid … has been observed at many of the corundum localities.
