Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Ca 2 MgAl 2 BSi 4 O 15 OH Gemdat.org, Management Team (2012)
CaCO 3Ulrich Henn and Claudio C.