Sub-Conchoidal, ConchoidalArthur Thomas, Conchoidal, Uneven
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references