How to use in-sentence of “hardness”:
+ In the Mohs scale, it has a hardness of seven.
+ Its hardness is about 5 on the Mohs scale.
+ Hematite on the hardness scale is 5 to 6.
+ For manufactured products other measures of hardness are better.
+ Feldspar is typically reddish or pale pink in color, and has a hardness of 6 on the Mohs scale, making it roughly as hard to scratch as glass.
Example sentences of “hardness”:
+ Diamonds have the highest hardness of any bulk material.
+ Polyurethane is available with different levels of stiffness, hardness or densities.
+ It has a hardness of 5.
+ Sapphire is actually just corundum and is one of the hardest minerals on the hardness scale.
+ Stibnite is soft, with a Mohs hardness of 2.
+ It has a Mohs hardness of 4.5.
+ For the steels, the hardness and tensile strength of the steel is related to the amount of carbon present.
+ Diamonds have the highest hardness of any bulk material.
+ Polyurethane is available with different levels of stiffness, hardness or densities.
+ By varying the ratio of graphite to clay, the hardness of the graphite rod could also be varied.
+ It has a Mohs hardness of 6.
+ It is very hard, with a Mohs hardness of 9.
+ Its hardness and high dispersion of light make it good for use in jewellery.