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The mineralogy is primarily a science and an art after various problems such as temperatures, pressures, the following elements of physical and chemical processes well ordered. Some are crystallized forms defined by taking the following provisions of the molecular atoms and give specimens of rare qualities of collection. Various sectors, sedimentary, metamorphic, depending on the land are identifying minerals of all kinds, combinations of volatile elements during the genesis of the "furnace of the pocket, the vein" after a long cooling followed by very high temperatures combined with pressure. Pierres.com-on gems you have a wide range of minerals, for beginners and collectors. You will find specimens per species (Quartz, Barite, ...) and / or by producing countries Aveyron (France) ..... For your convenience, gem-pierres.com changed its entire site to offer you the pages of his shop online sales of minerals and more dynamic view specimens available much faster. For each specimen mineralogical descriptions and photos with enlargements are available. The specimens were taken in daylight when indoors under white light giving a real color without modification. Specimens from the site are presented as follows. To your left you will find the tree that will take you to various countries representing major mining districts now existing minerals for sale on the site, a search engine where you can select according to your criteria and minerals your choice.