Diopside has been regarded only as a collector"s gemstone until recently, when the deep forest-green Chrome Diopside variety has made its way into the mainstream gemstone market. Although its intense green color rivals that of Emerald, its low hardness makes it prone to scratches, thus limiting it from overwhelming the gemstone industry.
| Chemical Formula | CaMgSi2O6 |
| Color | Green, Yellow, Brown, Black |
| Hardness | 5Â -Â 6 |
| Crystal System | Monoclinic |
| Refractive Index | 1.665Â -Â 1.730 |
| SG | 3.3Â -Â 3.5 |
| Transparency | Transparent. Star Diopside is opaque. |
| Double Refraction | 0.028 |
| Luster | Vitreous |
| Cleavage | 1,2 - prismatic. May also exhibit parting in one direction. |
| Mineral Class | Diopside |
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