Mineral/chemical composition

Description

Mineral/chemical composition

Description

Albite NaAlSi₃O₈

Sodium Plagioclase feldspar. Magmatic and pegmatitic rocks.

Magnesiohornblende Ca₂[Mg₄(Al, Fe³⁺)]Si₇AlO₂₂(OH)₂

Igneous and metamorphic rocks.

Anorthite CaAl₂Si₂O₈

Magmatic and metamorphic rocks.

Magnetite (lodestone)

mineral in igneous and metamorphic rocks.

Antigorite (MgFe²⁺)₃Si₂O₅(OH)₄

Common in regional and contact metamorphosed serpentinites.

Microcline KAlSi₃O_8,

Granitic pegmatites, hydrothermal and metamorphic rocks.

Augite―a pyroxene (Ca, Na)(Mg, Fe, Al, Ti)(Si, Al)₂O₆

Ferromagnesian silicate. Basic igneous and metamorphic rocks.

Montmorillonite NaCaAl₂Si₄O₁₀(OH)₂(H₂O)₁₀

Absorbing water and expanding.

Biotite―Black mica K(MgFe²⁺)₃AlSi₃O₁₀(OH, F)₂

Granitic rocks. Forms a series with phlogopite.

Muscovite KAl₂(Si₃Al)O₁₀(OH,F)₂

Granites and pegmatites.

Calcite CaCo₃

Found in all kind of rocks.

Nontronite

It is the iron (III) rich member of the smectite group of clay minerals.

Chiavennite CaMnBe₂Si₅O₁₃(OH)₂×2(H₂O)

Vitreous, massive, orange inter grown in white quartz matrix.

Offretite (K₂,Ca,Mg)₂×5Al₅Si₁₃O₃₆×15(H₂O)

Alteration of basalt with the addition of potash.

Clinochlore

(MgFe²⁺)₅Si₃Al₂O₁₀(OH)₈

Alteration mineral. Metamorphic rock.

Pargasite NaCa₂Mg₃Fe²⁺Si₆Al₃O₂₂(OH)₂

A complex inosilicate mineral of the amphibole group.

Diopside CaMg(Si₂O₆)

Basic and ultrabasic igneous and metamorphic rocks.

Quartz (SiO₂)

It is a component of almost every rock type.

Dolomite CaMg(CO₃)₂

Anhydrous carbonate mineral (sedimentary carbonate rock).

Ruizite

CaMn³⁺Si₂O₆(OH)×2(H₂O)

Cooling of a high temperature calc-silicate rock oxidizing onditions.

Goethite Fe³⁺O(OH)

Common in iron ore deposits. Concentrated in laterite soils.

Riebeckite

A sodium-rich member of the amphibole group of silicate minerals.

Halite NaCl

Marine or continental Evaporite deposits.

KARPINSKITE

NiMgSi₂O₅(OH)₂

An inadequately described mineral.

Hematite Fe₂O₃

Magmatic, sedimentary memetamorphic.

Zakharovite

Differentiated alkalic massifs.

Hydrogrossular

Ca₃Al₂(SiO₄)₃(OH)₄

Found in massive crystal grown in with idocrase.

Zircon ZrSiO₄

Zircon is a mineral (group of nesosilicates).