Common Silicate Minerals

Mineral Chemical formula Type of rocks that they are commonly found within Picture How People Use Them

Olivine (Mg, Fe)2SiO4 Ultramafic igneous rocks Click for full size A gemstone!
Pyroxene group (Mg, Fe)SiO2 Basaltic igneous rocks (coming soon!) .
Amphibole group (example: hornblende) (Ca2Mg5)Si8O22(OH)2 Andesitic igneous rocks Click for full size .
Micas Biotite:
K(Mg, Fe)3Si3O10(OH)2
Andesitic igneous rocks Click for full size Colonial Americans used sheets of mica as window glass.
Feldspars Orthoclase: KAlSi3O8
(Ca, Na)AlSi3O8
Granitic igneous rocks Click for full size Important for making ceramics and glass
Quartz SiO2 Granitic igneous rocks Click for full size Quartz is the raw material for glass and helps clocks keep time.

* Click on images above for full size.

Last modified April 18, 2003 by Lisa Gardiner.

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