Calcite vs Corundum
| Property | Calcite | Corundum |
|---|---|---|
| 化学式 | CaCO3 | Al2O3 |
| 晶系 | Trigonal | Trigonal |
| 鉱物分類 | 05 Carbonates and Nitrates | 04 Oxides and Hydroxides |
| モース硬度 | 3.0 | 9.0 |
| 色 | Colorless, white, yellow, orange, blue, green | Red (ruby), blue (sapphire), various colors |
| 光沢 | Vitreous | Adamantine |
| 条痕色 | White | Colorless |
| 透明度 | Transparent | Transparent |
| 劈開 | Perfect rhombohedral {1011} | None |
| 断口 | Conchoidal | Conchoidal to uneven |