Here's a breakdown of the top hardest substances:
1. Diamond: The hardest known naturally occurring substance.
2. Moissanite: Slightly softer than diamond, but still incredibly hard.
3. Corundum (Sapphire and Ruby): Known for their beautiful colors, they are also very hard.
It's important to note that the hardness of a substance is measured on the Mohs Hardness Scale, which is a relative scale based on scratch resistance.
