Hypersthene
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| Frequency | uncommon |
|---|---|
| Hardness | 5-6 |
| Density | 3.4-3.9 |
| Chemical Formula | (Mg,Fe)SiO3 |
Hypersthene is a mineral composed primarily of iron and magnesium silicates. It is named "very strong" in greek because of its hardness and resistance to shattering.