You can purchase samples at a scientific supply house such as Ward's, online.
No limestone and sandstone are sedimentary rocks. Chalk is not.
limestone or could be gypsum Could be chalk. Dip it in vinegar. If it fizzes, it might be a sedimentary carbonate rock like limestone or chalk. There is always a possibility it is another kind of sedimentary rock or possibly an extrusive igneous one. Testing is needed to be sure.
ShaleSandstoneLimestoneMudstoneand there tons more likeChalkClaystoneItacolumiteBituminous coalOoliteOil shaleArkoseArgilliteConglomerateDiatomiteRock saltRock GypsumCoquinaAsphalt rockAlabasterGreywacke or wackeTravertineBanded ironGritstoneJaspilliteOrthoquartziteRadiolariteLigniteMarlDolostoneFlintChertIronstoneBreccia
Chalk and marble are forms of limestone. They are all made of Calcium Carbonate.
Limestone or Sandstone are two examples of sedimentary rocks. Two examples of sedimentary rocks are slate (fine silt) and chalk (shell remains of sea creatures).
Limestone, sandstone, mudstone and chalk.
There is Sandstone, Chalk, Coal, Limestone, and Shale.
No limestone and sandstone are sedimentary rocks. Chalk is not.
These are some porous rocks: chalk, limestone, sandstone, pumice, scoria.
Sedimentary rock, such as limestone, chalk, slate and sandstone.
All types of rock can be weathered if near enough to the surface.
They are sedimentary rock. Four examples being chalk, sandstone, limestone and slate.
Limestone Chalk Calcareous sandstone Dolomite
Limestone mostly, sometimes in shale and coal.
There are organic rocks, like Limestone, and clastic (composed of fragments), like Sandstone. Within these groups there are others, like coal is organic and siltstone is clastic, but even within limestone and sandstone, there are further categories. There's oolitic limestone, chalk and 'shelly' limestones; and arkose, desert sandstone, orthoquartzite (generic sandstone), and others. Conglomerate is an interesting one, if you are after a rock that is not 'normal'.
There are organic rocks, like Limestone, and clastic (composed of fragments), like Sandstone. Within these groups there are others, like coal is organic and siltstone is clastic, but even within limestone and sandstone, there are further categories. There's oolitic limestone, chalk and 'shelly' limestones; and arkose, desert sandstone, orthoquartzite (generic sandstone), and others. Conglomerate is an interesting one, if you are after a rock that is not 'normal'.
No, Limestone is harder than chalk.