Chemical compositions of the natural pumice from different locations.
| Composition | Lipari, Sicily, Italy159 | Tikmeh Dash Reign, East Azerbaijan, Iran160 | Nevşehir, Turkey161 | Kayseri, Turkey161 | Isparta, Turkey161 | Balıkesir, Marmara, Turkey162 | Tenerife Island, Spain163 |
|---|---|---|---|---|---|---|---|
| SiO2 | 71.75 | 63.45 | 74.1 | 68.5 | 59.0 | 52.70 | 52.5 |
| Al2O3 | 12.33 | 17.24 | 13.5 | 14.9 | 16.6 | 3.80 | 19.7 |
| Fe2O3 | 1.98 | 2.86 | 1.4 | 3.1 | 4.8 | 0.07 | 3.7 |
| FeO | 0.02 | — | — | — | — | — | — |
| TiO2 | 0.11 | 0.37 | 0.07 | 0.2 | 0.6 | — | — |
| MgO | 0.12 | 1.03 | 0.4 | 0.95 | 1.8 | 0.50 | 3.5 |
| CaO | — | 1.2 | 2.9 | 4.6 | 28.50 | 2.1 | |
| K2O | 4.47 | 2.16 | 4.1 | 2.8 | 5.4 | 0.90 | 10.2 |
| Na2O | 3.59 | 2.00 | 3.7 | 4.1 | 5.2 | 0.60 | 8.3 |
| MnO | 0.07 | — | — | — | — | 0.06 | — |
| SrO | — | 0.09 | — | — | — | — | — |