Moh's Hardness Scale - Education Set stone jewelry Era: PleistoceneGeological Age: 2 mya

Era: PleistoceneGeological Age: 2 mya

and also naturally magnifies the stones

These remarkable creatures have a long evolutionary history spanning the Mesozoic to Cenozoic eras

thought to help quiet the mind and encourage restful sleep or deeper meditation

They are actually very difficult to accrue

Moh's Hardness Scale - Education Set stone jewelry Era: PleistoceneGeological Age: 2 myaDescription: These Moh's hardness scales contain the 9 primary minerals of the Mohs hardness scale (excluding diamond) mounted on an identification plaque. A Mohs Hardness Scale sample kit is a collection of reference minerals with known hardness values, typically ranging from 1 (the softest) to 10 (the hardest), used to test and compare the hardness of unknown materials. Users can scratch the materials with one another to determine the relative