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Top 5 hardest minerals on the Mohs scale

evergreen

Mohs hardness number — Mineral hardness

Snapshot · 2026-05-31

  1. 1

    Diamond

    10

  2. 2

    Corundum (ruby/sapphire)

    9

  3. 3

    Topaz

    8

  4. 4

    Quartz

    7

  5. 5

    Orthoclase feldspar

    6