Potential answers for "7 on the Mohs scale"

⭐⭐⭐⭐ QUARTZ
⭐⭐⭐⭐ TOPAZ
⭐⭐⭐ OPAL
⭐⭐⭐ TALC
⭐⭐⭐ HARDER
⭐⭐⭐ APATITE

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