Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Irregular/uneven, UnevenArthur Thomas, Gemstones (2009)
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)