What is the hardness of sandstone
There are many kinds of sandstone, the hardest is F15, F10, F8, F4
It refers to the grain size of 2 ~ 0.0625mm of the sand accounted for more than 100 percent of the total clastic particles of terrigenous clastic rock.1) by diameterAccording to the diameter of sand grain sandstone is divided into: (2 ~ 1mm), coarse sandstone (1 ~ 0.5mm) and sandstone (0.5 ~ 0.25mm), fine sandstone (0.25 ~ 0.125mm), sand particles (0.125 ~ 0.0625mm), above the sandstone, the corresponding size should be more than 50%.2) by rock typeAccording to the rock (mineral) classification: quartz sandstone (quartz content and various silicolites accounted for more than 95% of the total level of sand cuttings) and miscellaneous quartz sandstone, feldspar sandstone (detrital composition is mainly quartz and feldspar, quartz and feldspar content of less than 75%, more than 18.75%) and long stone complex sandstone and lithic sandstone (debris in the quartz content is lower than 75%, debris content is generally greater than 18.755, the ratio is greater than 3) / lithic feldspar and lithic graywacke.3) rock hardnessF4, F8, F10, F15, hardness is getting higher and higher.
Sandstone is composed of quartz grains (sand), which is stable in structure, usually light brown or red. Sandstone is a sedimentary rock, mainly formed by cementation of sand, the sand content should be greater than 50%. Most of the sandstone is composed of quartz or feldspar. The main component of A. quartz composition of more than 52%; B. clay around 15%; C. goethite about 18%; D. other substances more than 10%.
