ConchoidalGemdat.org, Management Team (2012), ConchoidalGemdat.org, Management Team (2012)
Irregular/uneven, UnevenArthur Thomas, Gemstones (2009)
(Cu) 3(OH) 2(CO 3) 2 + Cu 2(CO 3)(OH) 2Gemdat.org , Management Team (2012)
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)