Cobalt-bearing Calcite and Malachite
| ID | 653 | |
|---|---|---|
| Mineral |
Cobalt-bearing Calcite
Malachite |
|
| Location | Mashamba West Mine - Mutshatsha - Lualaba - Democratic Republic of the Congo | |
| Fluorescence | LW-UV: close SW-UV: close |
|
| Mindat.org |
View Cobalt-bearing Calcite information at mindat.org View Malachite information at mindat.org |
|
Mindat data
| ID | 1094 |
|---|---|
| Long ID | 1:1:1094:4 |
| Variety of | 859 |
| Entry type | 2 |
| ID | 2550 |
|---|---|
| Long ID | 1:1:2550:4 |
| Formula |
Cu2+2CO3(OH)2
|
| IMA Status |
APPROVED GRANDFATHERED |
| Description | Malachite is a green, very common secondary copper mineral with a widely variable habit. Typically, it is found as crystalline aggregates or crusts, often banded in appearance, like agates. It is also frequently found as botryoidal clusters of radiatin... |
| Other Occurrences | It is the most common secondary mineral found in the oxidized zones of copper deposits. |
| Industrial | A minor ore of copper when abundant enough in a copper deposit. |
| Discovery Year | Unno |
| Diapheny | Opaque |
| Cleavage |
Perfect on |
| Tenacity | brittle |
| Colour | Bright green, with crystals deeper shades of green, even very dark to nearly black; green to yellowish green in transmitted light. |
| Hardness (min) | 3.5 |
| Hardness (max) | 4.0 |
| About the name | Named "molochitus" in antiquity (see Pliny the Elder, 79 CE) after the Greek μαλαχή ("malachí"), "mallows," in allusion to the green colour of the leaves. Known in the new spelling, "malachites", at least by 1661. |
| Streak | Light green |
| Crystal System | Monoclinic |
| Cleavage Type | Perfect |
| Fracture type | Splintery |
| Morphology | Crystals uncommon, usually short or long prismatic or acicular, parallel to [001]; often grouped in rosettes, sprays, or tufts. Botryoidal to mammillary aggregates of radiating fibrous crystals more common. It may also be massive, compact, and stalactitic. Very rarely as curls. |
| Twinning | Untwinned crystals are extremely rare. Typically twinned on {100}, sometimes as penetration or polysynthetic twinning with the axis parallel to [201]. |
| Thermal Behaviour | Loses water at about 315°, leaving tenorite. |
| key_elements |
Cu |
| shortcode_ima | Mlc |
Details
Price: € 21
Dimensions: None mm x None mm x None mm
Weight: Not registered
Visibile in overview:
Notes:
None
| Symbol | Element | |
|---|---|---|
| C | Carbon | |
| Ca | Calcium | |
| Co | Cobalt |
|
| Cu | Copper | |
| H | Hydrogen | |
| O | Oxygen |