Minerals

Composition

Importance

Other facts

Feldspar

Common fieldspar silicon and oxygen. Specific fieldspar sodium, potassium,

calcium, aluminium .

Used in ceramics and glass making

Half of the earth’s crust is composed of

feldspar

Quartz

Consists of silica.

Prominent components of Sand and Granite and

used in Radio and Radar

Hard mineral virtually insoluble

in water.

Pyroxene

Pyroxene consists of calcium, aluminum,

magnesium, iron and silica.

commonly found in meteorites

Pyroxene forms 10 per cent of the

earth’s crust.

Amphibole

Aluminum, calcium, silica, iron, magnesium are the major elements of

amphiboles.

used in asbestos industry Hornblende is another form of amphiboles

They form 7 per cent of the earth’s crust

Mica

It comprises of potassium, aluminium, magnesium, iron, silica etc

used in instruments

electrical

It forms 4 percent of the earth's crust.

It is commonly found igneous and

metamorphic rocks.

Olivine

Magnesium, iron and silica are major elements of olivine.

Used in jewellery

Found rocks.

in

basaltic