Mostly 2 or 3. Halite and gypsum usually have a hardness of 2. Shale, sandstone, and conglomerate are about a 3. Limestone may eventually become somewhat harder as it morphs into marble, but may become quite soft if attacked by acids.
Sandstone does not have a Mohs hardness. Mohs hardness is a relative measure of a mineral's ability to be scratched by another mineral. Sandstone is not a mineral or even a homogeneous substance, but a rock composed of various sand sized particles of rock or mineral grains that are cemented by a variety of mineral cements and is therefore not suitable for measurement on the Mohs scale.
Sedimentary rock hardness or resistance to fracture varies depending on the circumstances of its formation, degree of weathering, and mineralogy.
7
5
It's called the Ore
how hard is diatomite on mohs scale
Dolomite has a hardness of 3.5-4 on the Mohs scale of hardness.
flint is a type of quartz, so it has a hardness of about 7 on the mohs scale of hardness
Tourmaline has a hardness of 7-7.5 on the Mohs hardness scale.
It's called the Ore
the mohs hardness scale
how hard is diatomite on mohs scale
The hardness is 3-4 on Mohs scale.
The Mohs scale is used to determine the relative hardness of minerals.
The hardness of Limonite is 4 t0 5.5 on the mohs hardness scale.
It is about 2.5 in the Mohs Hardness Scale.
Granite is not assigned a number on the Mohs scale of hardness. The Mohs scale is a measurement of the relative hardness of minerals. Because granite is a rock composed of a variety of minerals, only the individual minerals which compose it have a Mohs hardness.
Dolomite has a hardness of 3.5-4 on the Mohs scale of hardness.
flint is a type of quartz, so it has a hardness of about 7 on the mohs scale of hardness
Coal, as an organic sedimentary rock, is not determined to have a hardness on the Mohs scale of mineral hardness.
Tourmaline has a hardness of 7-7.5 on the Mohs hardness scale.