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