Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, Brittle
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
{110} Perfect, {???} Distinct, {???} Distinct
Good to perfect_usually N/A
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
CuAl6(PO4)4(OH)8 • 4H2O