Is Igneous Rock The Strongest?
Is Igneous Rock The Strongest? The strongest rock in the world is diabase, followed closely by other fine-grained igneous rocks and quartzite. Diabase is strongest in compression, tension, and shear stress. Why are igneous rocks hard? Hornblende (5-6) and Pyroxene minerals (5-6) are the main minerals in mafic basalts and gabbros. So, the minerals in