APPLICATIONS: | Minor ore of zinc and copper and mineral specimens. |
ASSOCIATED MINERALS: | Limonite, smithsonite, azurite, malachite, rosasite and calcite. |
CHEMICAL STRUCTURE: | (Zn, Cu)5(CO3)2(OH)6, Zinc Copper Carbonate Hydroxide. |
CLASS: | Carbonates. |
CLEAVAGE: | Perfect in one direction. |
COLOR: | Usually a grass green but varies from white to green to greenish blue to light blue. |
CRYSTRAL HABITS: | Radiating tufts of acicular crystals. Also encrustations of fiberous or lamellar masses. |
CRYSTAL SYSTEM: | Orthorhombic, 2 2 2. |
FIELD INDICATORS: | Crystal habits, color, associations, softness and reaction to acid. |
FRACTURE: | Uneven or fiberous. |
GENERAL INFORMATION: | Effervesceses easily in cold dilute hydrochloric acid. |
GEOGRAPHY: | Bisbee, Arizona; Laurium, Greece; Tsumeb, Namibia and Mapimi, Durango, Mexico. |
HARDNESS: | 1 - 2. |
LUSTER: | Silky to fibrous or pearly on more massive specimens. |
TRANSPARENCY: | Transparent to translucent. |
SPECIFIC GRAVITY: | 3.6 - 4. |
STREAK: | White to pale shades that depend on color. |
