French term (edited): �l�ments min�raux silcat�s

The largest group of minerals by far are the silicates, which are composed largely of silicon and oxygen, with the addition of ions such as aluminium, magnesium, iron and calcium. Some important rock-forming silicates include the feldspars, quartz, olivines, pyroxenes, amphiboles, garnets and micas.
http://fr.wikipedia.org/wiki/Glossaire_des_minéraux