Difference between revisions of "Quartz"
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(number 7 on the Mohs Hardness Scale) |
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| nameorigin=[[Germany|German]] "Quarz". | | nameorigin=[[Germany|German]] "Quarz". | ||
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| − | '''Quartz''' is the second most common [[mineral]] found on [[earth]]. More accurately, silicon dioxide, quartz has a chemical composition of SiO<sub>2</sub> arranged in a repeating lattice forming [[crystal]]s. Pure quartz is clear, but colored variations are created because of impurities in the crystal. | + | '''Quartz''' is the second most common [[mineral]] found on [[earth]]. More accurately, silicon dioxide, quartz has a chemical composition of SiO<sub>2</sub> arranged in a repeating lattice forming [[crystal]]s. Pure quartz is clear, but colored variations are created because of impurities in the crystal. Quartz is number 7 on the [[Mohs Hardness Scale]]. |
<br> Quartz is used in a number of applications such as [[glass]] making, optical lenses, abrasives, in electrical components or decorative gemstones or other stones. | <br> Quartz is used in a number of applications such as [[glass]] making, optical lenses, abrasives, in electrical components or decorative gemstones or other stones. | ||
[[Category:Minerals]] | [[Category:Minerals]] | ||
Revision as of 07:28, May 14, 2008
| Quartz | |
|---|---|
| |
| Chemical name | Silicon dioxide |
| Chemical formula | SiO2 |
| Identification | |
| Colors | Clear (with no impurities) |
| Crystal habit | 6-sided prism ending in 6-sided pyramid |
| Crystal system | rhombohedral |
| Cleavage | None |
| Fracture | Conchoidal |
| Hardness | 7 |
| Name origin | German "Quarz". |
| Specific gravity | 2.65 |
| Streak | White |
Quartz is the second most common mineral found on earth. More accurately, silicon dioxide, quartz has a chemical composition of SiO2 arranged in a repeating lattice forming crystals. Pure quartz is clear, but colored variations are created because of impurities in the crystal. Quartz is number 7 on the Mohs Hardness Scale.
Quartz is used in a number of applications such as glass making, optical lenses, abrasives, in electrical components or decorative gemstones or other stones.