nola162575 nola162575
  • 01-12-2020
  • Geography
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How can corundum be described?

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keyonaaaaa keyonaaaaa
  • 01-12-2020
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baddieanai baddieanai
  • 01-12-2020
a very hard mineral that consist of aluminum oxid occurring in massive and crystalline forms that can be synthesized, and that is used for gemstones (such as rub and sapphire) and as an abrasive.
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