Rocks & Minerals

Rocks & Minerals - 1 Rocks & Minerals...

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Unformatted text preview: 1 Rocks & Minerals Criteria to be a mineral Occurs naturally as an inorganic solid. Has a specifc internal structure. Has a specifc chemical composition can exchange occasionally. Has specifc physical properties. Minerals can be composed oF one element or a combination oF elements. Ice is a mineral! DiFFerent properties Streak/color Luster Cleavage/Fracture Crystal Form Density Hardness Streak and Color Luster Cleavage and racture 2 Crystal Form Mohs scale of hardness Common minerals that form rocks Silicates Non-silicates Elements in Earths crust Silicates ~93% of the crust. Silica and Oxygen form together in a complex ion in the shape of a tetrahedron. Form in varying shapes. Most of the earths upper crust and upper mantle are composed of Fe, Mg, Na, Ca, K, and Al combined with Si and O2. Tetrahedron 3 FELSIC minerals (feldspar+silicate+) Rich in Si and Al....
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Rocks & Minerals - 1 Rocks & Minerals...

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