| Samples | 81 (keV) | 356 (keV) | 662 (keV) | 1173 (keV) | 1332 (keV) |
1 | Yellow Iraqi granite | 0.650 | 0.263 | 0.201 | 0.153 | 0.145 |
2 | Orange Spanish granite | 0.670 | 0.268 | 0.203 | 0.155 | 0.145 |
3 | Red Indian granite | 0.680 | 0.270 | 0.205 | 0.156 | 0.145 |
4 | Grey Chinese granite | 0.641 | 0.265 | 0.201 | 0.151 | 0.143 |
5 | Colored Egyptian granite | 0.587 | 0.261 | 0.198 | 0.151 | 0.144 |
6 | White Turkish granite | 0.661 | 0.266 | 0.203 | 0.154 | 0.145 |
7 | Lead | --------- | --------- | 1.24 | 0.691 | 0.634 |