| Samples | 81 (keV) | 356 (keV) | 662 (keV) | 1173 (keV) | 1332 (keV) |
1 | Yellow Iraqi granite | 0.242 | 0.099 | 0.075 | 0.057 | 0.054 |
2 | Orange Spanish granite | 0.252 | 0.101 | 0.0766 | 0.058 | 0.054 |
3 | Red Indian granite | 0.254 | 0.101 | 0.076 | 0.058 | 0.054 |
4 | Grey Chinese granite | 0.242 | 0.100 | 0.076 | 0.057 | 0.054 |
5 | Colored Egyptian granite | 0.225 | 0.100 | 0.076 | 0.058 | 0.054 |
6 | White Turkish granite | 0.246 | 0.099 | 0.075 | 0.057 | 0.053 |
7 | Lead | -------- | ------- | 0.110 | 0.061 | 0.056 |