Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Uneven, Sub-Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)
ZnCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references