UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Uneven
Uneven, Uneven, Gems, Sixth Edition (2006)
Perfect on {0001}
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Mg 6Cr 2(CO 3)(OH) 16 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KAlSi3O8