UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, Brittle, Metallic
Perfect on {110} at 56° and 124°; partings on {010} and {100}
{100} Good, {010} Good, {001} Good
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
CoAsSAnthony et al , Handbook of mineralogy (2001)