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Find out how may minerals contribute to the hardness and rocks?

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asked Feb 7, 2017 by weng (140 points)

1 Answer

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Silicates are composed of SiOmolecules under differing conditions of temperature and pressure they form Quartz, Agate, chert, flint, chalcedony and other minerals all very hard. 

Corundum is Al2O- emerald, ruby, aquamarine are forms of it, the colors are derived from chromium, titanium iron and vanadium.

Beryls are variations of (Be,Na,Li,Ce)3Al2Si6O18  are referred to as beryllium aluminum silicates 

Beryllium, sodium, lithium and cesium

The functions of chemical bonds, crystalline structure, heat and pressure all effect "hardness"‚Äč.

Carbon is the only element in diamond and that is the only formula given for it. A diamond is essentially a giant carbon molecule. It is formed under great pressure. 

That is a great simplification but should give a basis for continuing your inqiury.

answered Feb 7, 2017 by Weasel (57,580 points)