Potential answers for "Mineral in abrasives"

⭐⭐⭐⭐ CORUNDUM
⭐⭐ ZIRCONIA
⭐⭐ BORON
⭐⭐ HARSH
⭐⭐ GARNETS
⭐ TALC
⭐ ALENA
⭐ OPAL
⭐ MOHS

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