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23 April, 01:47

1. Which mineral is common and makes up about 4% of Earth's crust?

gold calcite jadeite

2. Why must humans find substitutes for many minerals found on Earth?

form at an extremely slow rate controlled by other countries too deep in the Earth to collect

3. Which of these is the rarest mineral? copper feldspar painite

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  1. 23 April, 03:40
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    1. B. Calcite, 2. A. Form at an extremely slow rate, 3. C. Panite
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