| 1 | To identify light-tight opaque (ore) minerals. |
| 2 | Particle size measurement that forms the basis of ore enrichment. |
| 3 | Determining the structure and textures of ore minerals. |
| 4 | Identify the types of coal according to the reflection intensities. |
| 5 | Supporting the Chemical analysis. |
| 6 | Examination of metallic mineral deposits, contribution to the explanation of the genesis. |
| 7 | Contribution of metallurgical studies |