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How to grade brown corundum

The main component of brown corundum is aluminum oxide, and its grading is also distinguished by aluminum content [1]. The lower the aluminum content, the lower the hardness.

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2021

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11

The main component of brown corundum is aluminum oxide, and its grading is also distinguished by aluminum content . The lower the aluminum content, the lower the hardness.

The main component of brown corundum is aluminum oxide, and its grading is also distinguished by aluminum content . The lower the aluminum content, the lower the hardness.

09

2021

/

11

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