Top 5 hardest minerals on the Mohs scale
evergreenThe 5 hardest minerals on the Mohs scale by mohs hardness number: Diamond, Corundum (ruby/sapphire), Topaz, Quartz, Orthoclase feldspar.
Snapshot · 2026-09-23
Today's five picks, one great list, and today's game. Free, every evening.
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Diamond
10
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