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What is quartz?

Quartz is a naturally occurring silicate mineral composed of silicon dioxide (SiO2). Its hardness is 7 on the Mohs scale and it is in the trigonal crystal system. Quartz posse (MORE)

What is the hardness of quartz?

  Quartz is listed as a 7 on the Mohs scale of relative mineral hardness.  
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In Mining

Where is quartz?

Quartz is the second most abundant mineral in the Earth's continental crust, after feldspar. It is made up of a continuous framework of SiO4 silicon--oxygen tetrahedra, with e (MORE)
In Geology

Is quartz cubic?

No it is hexagonal - six sided in long crystals topped with a hexagonal pyramid. It will scratch glass!
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How does quartz erode?

Quartz- can only be eroded by Chemical weathering- Although quartz is very hard on the mohs hardness scale, chemical weathering can still affect the minerals size and shape. (MORE)
In Geology

What composition does quartz have?

SiO2 Please be a bit more precise. The composition of quartz is SiO2 which means that two atoms of oxygen share one atom of silicon. It can be described as "Silicon di-oxide (MORE)

What can you do with quartz?

Chemically it is Silica - Silicon Dioxide - the main constituent of glass.       Quartz is piezo-electric and was used in early sonar transducers, but modern sonar uses (MORE)

What does quartz?

Your question isn't complete or interpretable.    Quartz is a mineral found in nature as a crystalline stone. It is  the second most common mineral in the Earth's surf (MORE)