UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Uneven
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)
Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)