APPLICATIONS: | Minor ore of copper and mineral specimens. |
ASSOCIATED MINERALS: | Limonite, brochantite, cuprite, malachite, gypsum, chalcanthite, atacamite and azurite. |
CHEMICAL STRUCTURE: | Cu3SO4(OH)4, Copper Sulfate Hydroxide. |
CLASS: | Sulfates. |
CLEAVAGE: | Perfect in one direction and poor in another. |
COLOR: | Bright emerald green or dark green to almost black. |
CRYSTRAL HABITS: | Small tabular crystals and acicular or fibrous crystal aggregates that form into coatings and tufts. Also, found in veins and as reniform, massive or granular specimens. |
CRYSTAL SYSTEM: | Orthorhombic, 2/m 2/m 2/m. |
FIELD INDICATORS: | Crystal habit, associations, hardness, cleavage, non-reaction to hydrochloric acid and color. |
FRACTURE: | Uneven. |
GEMERAL INFORMATION: | Does not effervesce in hydrochloric acid and crystals can be vertically striated. |
GEOGRAPHY: | Chuquicamata, Chile; Antler mine, Mexico; Bisbee, Arizona, Nevada, California, New Mexico and Utah, USA. |
HARDNESS: | 3.5. |
LUSTER: | Vitreous. |
TRANSPARENCY: | Transparent to translucent. |
SPECIFIC GRAVITY: | 3.9. |
STREAK: | Pale green. |
