UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, Brittle, Metallic
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
CoAsSAnthony et al , Handbook of mineralogy (2001)
Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.