Cat. No. GEO-06-Z15-9000-001Single (1 EA)Oxide and Hydroxide Minerals
A specimen of corundum, which at 9 on the Mohs scale is surpassed in hardness only by diamond among familiar minerals. It shows the upper end of the hardness scale in geology lessons.
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Single (1 EA)
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A specimen of corundum, which at 9 on the Mohs scale is surpassed in hardness only by diamond among familiar minerals. It shows the upper end of the hardness scale in geology lessons.