| Variables | SiO2 | Al2O3 | Fe2O3 | MgO | CaO | Na2O | K2O | TiO2 | P2O5 | MnO | Cr2O3 |
| SiO2 | 1 |
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| Al2O3 | −0.870 | 1 |
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| Fe2O3 | −0.215 | −0.159 | 1 |
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| MgO | 0.116 | 0.243 | −0.983 | 1 |
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| CaO | 0.400 | 0.022 | −0.924 | 0.920 | 1 |
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| Na2O | 0.770 | −0.619 | 0.069 | −0.116 | 0.280 | 1 |
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| K2O | −0.535 | 0.148 | 0.534 | −0.535 | −0.809 | −0.727 | 1 |
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| TiO2 | 0.071 | −0.414 | 0.942 | −0.948 | −0.810 | 0.284 | 0.364 | 1 |
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| P2O5 | 0.058 | −0.374 | 0.865 | −0.863 | −0.748 | 0.231 | 0.327 | 0.964 | 1 |
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| MnO | −0.400 | −0.010 | 0.644 | −0.635 | −0.846 | −0.568 | 0.934 | 0.528 | 0.498 | 1 |
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| Cr2O3 | −0.054 | 0.392 | −0.936 | 0.956 | 0.825 | −0.265 | −0.428 | −0.918 | −0.787 | −0.581 | 1 |