| Value | Category | Cases | |
|---|---|---|---|
| 1 | Gem mining | 225 |
13.4%
|
| 2 | Sand mining | 332 |
19.7%
|
| 3 | Clay mining | 115 |
6.8%
|
| 4 | Stone mining | 897 |
53.2%
|
| 5 | Silica mining | 2 |
0.1%
|
| 6 | Plumbego mining | 8 |
0.5%
|
| 7 | Iron ore mining | 5 |
0.3%
|
| 8 | Quarrying of dolamite | 33 |
2%
|
| 9 | Other | 68 |
4%
|