Apatite vs Corundum
| Property | Apatite | Corundum |
|---|---|---|
| Formel | Ca5(PO4)3(F,Cl,OH) | Al2O3 |
| Kristallsystem | Hexagonal | Trigonal |
| Mineralklasse | 08 Phosphates, Arsenates, and Vanadates | 04 Oxides and Hydroxides |
| Mohshärte | 5.0 | 9.0 |
| Farbe | Green, blue, yellow, violet, colorless | Red (ruby), blue (sapphire), various colors |
| Glanz | Vitreous | Adamantine |
| Strichfarbe | White | Colorless |
| Transparenz | Transparent | Transparent |
| Spaltbarkeit | Poor {0001} | None |
| Bruch | Conchoidal to uneven | Conchoidal to uneven |