| The Very Highest Quality Quartz Information. . . |
| Quartz |   |
Quartz
Quartz is a crystalline rock or mineral composed of silicon dioxide.
It is actually very common, and occurs in many varieties, a number of which are gemstones, some of which are very beautiful and very rare.
Gem Varieties of Quartz
The following are the main gem varieties of quartz. For details of each type, please take a look at their individual pages, where available. Further information about the other varieties will follow when time permits.
- Amethyst
- Bloodstone
- Citrine
- Cairngorm
- Cat's Eye
- Aventurine
- Rose Quartz
- Prase
- Siderite
- Rock Crystal
- Chalcedony
- Tiger's Eye
- Cornelian or Carnelian
- Sard
- Chrysoprase
- Plasma
- Bloodstone or Heliotrope
- Agate
- Petrified Wood
- Onyx
- Sardonyx
- Jasper
- Hornstone
- Opal
- Fire Opal
Technical Details
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Chemical Composition and Name | SiO2 - Silicon Dioxide
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Hardness | 7
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