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minerals present are classified according to the crystallographic principle, which refers to the chemical classes, the minerals divided into groups according to their chemical compounds. Minerals previously classified as physically not had the tools to analyze in more detail, since the beginning of the advancement of optical technologies and could begin a detailed analysis of minerals.
Any mineral known can be integrated within these groups, because almost all of them include some of these compounds.

1 .- Native Elements: These are found in nature in free state, pure or native, not merge or form chemical compounds. Examples: gold, silver, sulfur, diamond.

2 .- sulphides: compounds of various minerals combined with sulfur. Examples: pyrite, galena, sphalerite, cinnabar.

3 .- sulfosalts : mineral composed of lead, copper and silver combined with sulfur and some other minerals such as arsenic, bismuth or antimony. Examples: pyrargyrite, proustite.

4 .- oxides : results from a combination of oxygen with an element. Examples: oligisto, corundum, cassiterite, bauxite.

5 .- Halides : consisting of a halogen with another element, such as chlorine, fluorine, iodine or bromine. Examples: salt, halite.

6 .- carbonates, salts derived from the combination of carbonic acid and metal. Examples: calcite, azurite, marble, malachite.

7 .- Nitrates, salts derived from nitric acid. Examples: sodium nitrate (or Chile), nitrate or potassium nitrate.

8 .- borates, consisting of mineral salts or esters of boric acid. Examples: borax, rasorita.

9 .- phosphates, arsenates and vanadates : salt or ester of phosphoric acid, arsenic and vanadium. Examples: apatite, turquoise, pyromorphite.

10 .- Sulphate : salts or esters of sulfuric acid. Examples: gypsum, anhydrite, barite.

11 .- Chromates, tungstates and molybdates : chromium, or tungsten molibeno. Examples: wolframite, crocoite.

12 .- Silicate : silicic acid salts, basic compounds of the lithosphere, forming 95% of the earth's crust. Examples: silica, feldspar, mica, quartz, pyroxene, talc, clay.

13 .- Radioactive minerals : composed of elements emitting radiation. Examples: uraninite, thorianite, Torit.