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Slate is a rock, so you won't find it listed on the Mohs Scale, because that scale of hardness applies to minerals. I'll go out on a limb though, and suggest that slate is probably around 2 to 3 or so, but this will be variable, depending on the quality of the slate, and degree of weathering, etc.
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What is the hardness of Limonite on the mohs hardness scale?
Limonite has a hardness of about 4 to 5.5 on the Mohs hardness scale.
How hard is a finger nail on the mohs hardness scale?
A fingernail has a hardness of around 2.5 on the Mohs hardness scale, which means it can be easily scratched by materials with a higher hardness level.
What is the fourth mineral on Mohs' Scale of Hardness?
The fourth mineral on Mohs' Scale of Hardness is fluorite. It has a hardness of 4 on the scale.
What scale is used to rank the hardness or softness of minerals?
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.
What hardness is gneiss?
The hardness is 6 on the MOHS scale
