5
Diatomite has a hardness of around 5.5 on the Mohs scale of hardness.
It's called the Ore
Azurite has a hardness of 3.5 to 4 on the Mohs hardness scale.
flint is a type of quartz, so it has a hardness of about 7 on the mohs scale of hardness
Dolomite has a hardness of 3.5-4 on the Mohs scale of hardness.
apatite, cobalt, zirconium, palladium, tooth enamel, obsidian (volcanic glass)
Diatomite has a hardness of around 5.5 on the Mohs scale of hardness.
It's called the Ore
The hardness of Limonite is 4 t0 5.5 on the mohs hardness scale.
Azurite has a hardness of 3.5 to 4 on the Mohs hardness scale.
flint is a type of quartz, so it has a hardness of about 7 on the mohs scale of hardness
The hardness is 3-4 on Mohs scale.
Nickel has a hardness of 4 on the Mohs scale.
Dolomite has a hardness of 3.5-4 on the Mohs scale of hardness.
The Mohs scale is used to determine the relative hardness of minerals.
This scale was proposed by the Austrian geologist Friderich Mohs.
Aluminum Oxide is roughly 8.5 - 9.0 on the hardness scale.