Feldspars generally have a hardness of 6 on Mohs' hardness scale.
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2.5 through 2.8. Different types of feldspar have different densities. But the most common one is 2.5 through 2.8. Hope this helps. :)
Orthoclase Feldspar.
Feldspar can be found in many things, including soap
granite
The Mohs hardness of sodium chloride is 2,5.
Go to an area nearby a formerly active volcano and you will find feldspar, because it is an igneous rock. Or you can go to an area such as Yellowstone Park where there are open rock areas and you will be sure to find feldspar.