The Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer material. It was created in 1812 by the German geologist and mineralogist Friedrich Mohs and is one of several definitions of hardness in materials science.
Rocks & Minerals may sound boring & pointless. But each individual sample tells a story about the Earth. Studying the character-istics tells us the journey magma or sediment has taken beneath our feet to reach the surface. Not care-ing about our planet's behavior's is pure ignorance.