| Crystal | Quartz crystallises in the trigonal scheme and forms thereby hexagonal prismatic crystals, which end into on a point converging planes. |
| Colour | Pure quartz is colourlessly and translucent. |
| Specific gravity | 2.65 |
| Hardness | 7 |
| Application | Quartz is a very important mineral in the industry: glasses, paints, abrasives, lenses, prisms, precision instruments, ... |
| Belgium | Quartz occurs in Belgium at many places as massif quartz, whereas crystals are found in cavities and slits of different rocks. | | |
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Minerals >Oxides > Quartz
