Brittle, Metallic, Brittle, Metallic
Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal
CaZnSiO 4 · H 2OAnthony et al , Handbook of mineralogy (2001)
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)