Eclogite is a metamorphic rock with a primary mineral base of omphacite, combined with garnet and traces of other soft stone such as kyanite. It is important because the heavy density occurs from originating in the earth mantle, below the crust layer.
| Chemical Formula | (Ca1Na)(MgFe2Al)Si2O6. |
| Color | Multicolored, Gray, Red, Blue, Green |
| Hardness | 5Â -Â 6.0 |
| Crystal System | Monoclinic |
| Refractive Index | 1.66Â -Â 1.70 |
| SG | 3.16Â -Â 3.43 |
| Transparency | Primarily translucent |
| Double Refraction | None |
| Luster | Vitreous to silkiness |
| Cleavage | Good with uneven chonchoidal. |
| Mineral Class | Omphacite |
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