| Minerals (%) | AS 1 Nail 1 | AS 2 Nail 1 | AS 3 Nail 1 | AS 4 Nail 1 | AS 5 Nail 2 | AS 6 Nail 2 | Environment of crystallization |
| Metallic Iron | 0 | 100 | 0 | 0 | 0 | 0 | Wrought iron, smelted from pyritic iron ore |
| Goethite α FeO(OH) | 50.5 | 0 | 97 | 20.5 | 34.8 | 52.1 | Crystalization at pH ~7 in moist – well oxygenated setting |
| Lepidocrocite γ FeO(OH) | 7.1 | 0 | 0 | 6.8 | 8.7 | 7.3 | Crystalization under anaerobic -hydromorphic conditions at pH~6 |
| Magnetite Fe3O4 | 27.3 | 0 | 0 | 6.8 | 47.4 | 24.7 | Biomineralization in basic, suboxic, anaerobic environment, pH > 7 |
| Akaganeite (ß-FeOOH,Cl) | 0 | 0 | 0 | 0 | 6.2 | 0 | Hyper-chlorinated, acidic and oxidizing environment, pH < 7 |
| Calcite CaCO3 | 15.1 | 0 | 3 | 34.2 | 2.9 | 5.1 | Flowstone deposit |
| Aragonite CaCO3 | 0 | 0 | 0 | 22.7 | 0 | 0 | Cave-type crystallization |
| Quartz SiO2 | 0 | 0 | 0 | 9 | 0 | 0 | Sandstone pockets in Gihon aquifer |
| Ankerite Ca(Fe,Mg)(CO3)2 | 0 | 0 | 0 | 0 | 0 | 10.6 | Cave-type crystallization |
| Gypsum (CaSO4∙2H2O). | 0 | 0 | 0 | 0 | 0 | 0.3 | Cave-type crystallization |