Calcite vs Corundum
| Property | Calcite | Corundum |
|---|---|---|
| الصيغة الكيميائية | CaCO3 | Al2O3 |
| النظام البلوري | Trigonal | Trigonal |
| صنف المعدن | 05 Carbonates and Nitrates | 04 Oxides and Hydroxides |
| صلادة موس | 3.0 | 9.0 |
| اللون | Colorless, white, yellow, orange, blue, green | Red (ruby), blue (sapphire), various colors |
| اللمعان | Vitreous | Adamantine |
| لون الخط | White | Colorless |
| الشفافية | Transparent | Transparent |
| الانفصام | Perfect rhombohedral {1011} | None |
| الكسر | Conchoidal | Conchoidal to uneven |