Irregular/uneven, UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Uneven
Conchoidal, Conchoidal, Handbook of mineralogy (2001)
CaAl 2Si 3O 10 · 3H 2OUlrich Henn and Claudio C.
(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)