ConchoidalGemdat.org, Management Team (2012), ConchoidalGemdat.org, Management Team (2012)
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)
(Fe,Mg) 3Al 2(SiO 4) 3gemdat.org , Management Team (2012)
Ca 5(PO 4) 3FAnthony et al , Handbook of mineralogy (2001)