Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)
Ca 2Mg 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.