Question

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Write the note on ," Type of minerals ".

Answer 1

Minerals make up most of the earth and are an important part of our everyday life.

Minerals are simply naturally occurring substances which have a crystalline structure. There are many thousands of minerals recognised, but only about 30 are most common.


A basic classification for minerals is:

Native elements. eg. Gold, Silver, Mercury, graphite, diamond.

Oxides. eg corundum (incl. sapphire), hematite, spinel.

Hydroxides. eg. Goethite, brucite.

Sulfides. eg. Pyrite, galena, sphalerite.

Sulfates. eg. Baryte, gypsum.

Carbonates. eg. Calcite, magnesite, dolomite.

Phosphates. eg. Apatite, monazite.

Halides. eg. Fluorite, halite (rock salt).

Silicates (most common)

Orthosilicates. eg. Garnet, olivine.

Ring silicates. eg. Tourmaline, beryl.

Chain silicates. eg. Pyroxenes, amphiboles.

Sheet silicates. eg. Muscovite mica, biotite mica, clay minerals

Framework silicates.



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Answer 2

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