Here is a short video on how to test the density of a sharpening stone or rough stone material.
This process is how we identify Jade vs other stones that look similar but can be proven to be not dense enough to fall in the range of jade.
If your Interested in seeing the actual sharpening stones after they are cut from these rocks then check out NaturalWhetstoneSharpening.com
#SharpeningStone #Density #SpecificGravity 
