Mohs Hardness Scale of Minerals
Minerals are defined by five criteria: 1. Naturally Occurring, 2. Inorganic, 3. Solid, 4. Defined Chemical (Atomic) Formula, and 5. A unique set of physical properties.
What are the ten internationally recognized minerals of the Mohs Hardness Scale?
1. Talc
2. Gypsum
3. Calcite
4. Flourite
5. Apatite
6. Feldspar (Orthoclase)
7. Quartz
8. Topaz
9. Corundum
