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What is the only mineral listed below that is harder than an alexandrite?

  1. Chrysoberyl
  2. Corundum
  3. Beryl
  4. Lapis Luzuli

🙋 I know…the answer is 2. Corundum, with a hardness of 9. Chrysoberyl and Alexandrite have a hardness of 8.5. Beryl are 7.5-8, and Lapis Lazuli is 5-6.

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Of course Corundum)