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Ore |
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Ore |
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Chrome Ore
| Specification Chart | |
Name of the ORE |
Chrome Ore |
It's Types |
Chromite |
| Chemical Name | Ferrous Chromic Oxide |
| Chemical Formula | FeCr2O4 |
Chemical & Physical
Specifications |
Cr2O3: 40-45% (min) SiO2: 2.7%-8.5% (max) 4% (min) Al2O3: 3.18% (max) 4%(min) Phos: 0.007% (max) Sulphur: 0.03% (max) Cr:Fe ratio: 1:8:1 Physical Size: Friable |
| Appearance | |
| Color | Brownish black to a deep dark black |
| Luster | Metallic to greasy |
| Transparency | Crystals are opaque |
| Crystal System | Isometric: 4/m bar 3 2/m |
| Crystal Habits | Crystal Habits include octahedrons often with dodecahedral faces modifing the edges of the octahedron to the point of rounding the crystal. Well formed crystals are rare and chromite is usually found massive or granular |
| Cleavage | - |
| Fracture | Conchoidal |
| Hardness | 5.5 |
| Specific Gravity | 4.5 - 4.8 (average for metallic minerals) |
| Streak | Brown |
| Other characteristics | Weakly magnetic and an octahedral parting is sometimes seen |
