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Why do rocks have different colors?
Question Date: 2017-10-24
Answer 1:

To answer your question, you first need to know that rocks are made of up minerals. Every mineral has a unique color. The mineral feldspar is usually pink, and the mineral quartz is white. A granite composed of mostly feldspar (pink) and biotite (black), and has a different color than sandstone composed of mostly quartz (white). So because different rocks are made up of different minerals, they are different colors.

Thanks for the great question! Julie

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