It's a 6
The hardness of Limonite is 4 t0 5.5 on the mohs hardness scale.
It is about 2.5 in the Mohs Hardness Scale.
The fourth mineral on Mohs' Scale of Hardness is fluorite. It has a hardness of 4 on the scale.
The Mohs Scale of Hardness determines the hardness of minerals by scratching them with commonly found objects. The minerals are assigned a number which corresponds to their hardness; higher numbers indicate higher hardness.
The hardness is 6 on the MOHS scale
Opal has a hardness of 5.5 to 6.5 on Mohs Scale
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
Nickel has a hardness of 4 on the Mohs scale.
The hardness is 3-4 on 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.
The hardness of fire opal ranges from 5.5 to 6.5 on the Mohs scale, making it relatively soft compared to other gemstones. This means it can be susceptible to scratching and abrasion if not handled carefully.
This scale was proposed by the Austrian geologist Friderich Mohs.