10 There are more than 2,000 kinds of minerals, but fewer than 20 are common minerals that form rock 10 minerals make up 90% of the earth’s crust
11 2 Main Types of MineralsSilicates and Non-Silicates
12 Silicates Contain atoms of silicon (Si) and oxygen (O) Forms a tetrahedronMany contain one or more different kinds of atomsEx. Feldspar – silicon and oxygen with potassiumSiO2 - Quartz96% of the crust is made of silicates
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