Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, Brittle
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
{110} Perfect, {???} Distinct, {???} Distinct
Perfect on {110} at 56° and 124°; partings on {010} and {100}
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.