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Compositions of nine natural minerals.
| Composition (%) | RQ | RCD | RJP | OBS | TM | GN | HEM | MGN | ROCH |
|---|---|---|---|---|---|---|---|---|---|
| SiO2 | 98.86 | 97.65 | 89.81 | 79.11 | 70.74 | 30.92 | 2.64 | 1.97 | 14.51 |
| Fe2O3 | 0.82 | 1.49 | 7.40 | 2.50 | 2.72 | 44.96 | 83.98 | 83.79 | 69.34 |
| Al2O3 | 0.19 | 0.43 | 0.32 | 9.09 | 15.47 | 18.35 | 1.87 | – | 10.98 |
| CaO | – | 0.15 | 2.00 | – | 1.23 | – | 5.75 | – | 1.94 |
| K2O | – | – | – | 4.06 | 3.19 | – | – | – | – |
| Na2O | – | – | – | 4.36 | 2.81 | – | – | – | – |
| MgO | – | – | – | – | 2.92 | 3.46 | – | – | – |
| MnO | – | – | – | – | – | 1.29 | – | – | – |
| P2O5 | – | – | – | – | – | – | 5.39 | – | – |
| BaO | – | – | – | – | – | – | – | 12.62 | – |
| TiO2 | – | – | – | – | – | – | – | – | 1.71 |
