Category:Superhard materials

This category is for materials with hardness approaching, equalling, or possibly surpassing the hardness of diamond.

The next two hardest materials are Polycrystalline Diamond (PCD), Polycrystalline Cubic Boron Nitride (PCBN). Invented by GE, these are widely used today in all areas of manufacture.

Fictional "hardest materials" such as adamantium and scrith should be categorized in Category:Fictional materials, not here.