红宝石的分子式为Al2O3,它是属于()A、微量Al+3离子致色的他色宝石B、微量Cr+3离子致色的他色宝石C、大量Al+3离子致色的自色宝石

红宝石的分子式为Al2O3,它是属于()

  • A、微量Al+3离子致色的他色宝石
  • B、微量Cr+3离子致色的他色宝石
  • C、大量Al+3离子致色的自色宝石

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