UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Uneven
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
{010} Perfect, {001} Distinct
Perfect on {110} at 56° and 124°; partings on {010} and {100}
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.