Uneven, Uneven, Gemstones of the world (2001) More from other references
UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Uneven
H 4Mg 3Si 2O 9Walter Schumann , Gemstones of the world (2001) More from other references
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)