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Biology, 10.01.2020 22:31 nnaomii

7. which of the following groupings lists only minerals?
a. obsidian, gypsum, corundum
quartz, coal, basalt
b. fluorite, feldspar, copper
d. pyrite, halite, brass

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7. which of the following groupings lists only minerals?
a. obsidian, gypsum, corundum
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