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[Subject: Mineralogy]
- A hard mineral composed of silica, SiO2, found worldwide in many different types of rocks
Translated by: NISHU VARMA
Translated in 24 languages
[Subject: Generalities]
Translated in 5 languages
[Subject: Chemistry]
Translated in 2 languages
Translated by: FARHAD PEZESHKI
Translated by: CHEHAIMI MOHAMAD
Translated in 1 languages
[Subject: Geology, Meteorology, Hydrology]