Presentation on theme: "Earth Science, 6e Edward J. Tarbuck & Frederick K. Lutgens."— Presentation transcript:
Earth Science, 6e Edward J. Tarbuck & Frederick K. Lutgens
Minerals, What for? Do we need Minerals? Name a few things made of minerals: Example: Glass is made from…
Minerals: the building blocks of rocks Definition of a mineral Natural Inorganic Solid Possess an orderly internal structure of atoms Have a definite chemical composition Mineraloid - lacks an orderly internal structure
Minerals Physical properties of minerals Crystal form Luster Color Streak Hardness versus Tenacity Cleavage (breaks evenly)
The mineral quartz often exhibits good crystal form
Minerals Silicates Minerals (see page 35) Most common mineral group (90% of minerals) Contain the silicon-oxygen tetrahedron Four oxygen atoms surrounding a much smaller silicon atom Combines with other atoms to form the various silicate structures
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