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Why, when you held up the two pieces of rock from the volcano, were they different colours?

April 26, 2017Colours different held pieces rock volcano

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Why, when you held up the two pieces of rock from the volcano, were they different colours?

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The different colours of the rocks were because they are made up of different minerals. The light coloured rock has lots of quartz in it, while the dark coloured rock is made up of basalt (bluestone).