| A | B |
|---|
| nonmetallic mineral prized for its beauty | gemstone |
| minerals that conduct electricity | metallic |
| a material that bonds with the impurities during smelting | flux |
| floating barge on which buckets excavate sediments | dredging |
| networks of entries in subsurface coal mines | rooms |
| land recovery process | reclamation |
| sinking regions of the ground with little horizontal movement | subsidence |
| process where crushed ore is melted at high temps and separated | smelting |
| term used to describe how a mineral shines | luster |
| term used to describe how a mineral feels | texture |
| open pit used to mine minerals near the surface | quarry |
| rocks that cover near surface coal seams | overburden |
| minerals with no commercial value | gangue |
| these form in arid regions with high evaporation rates | evaporites |
| minerals that contain valuable substances | ore minerals |
| deposits concentrated by wind and water | placer deposits |
| layer of impurities on top of molten metal that forms during smelting | slag |
| mineral that makes up most of the earth's crust | silica |
| refers to the color of the mineral when its a fine powder | streak |
| when a mineral breaks smoothly along planes | cleavage |
