No. Sand grains could be a mixture of particles of all sorts of different rock grains. Some sands are mostly quartz grains, some are grains of feldspars, some are gypsum, some are basaltic, and some are combinations of types. Sand can actually be formed from almost any rock type.
sand grains
Sandstone is made from tightly packed grains of sand that have been compressed and cemented together over time.
The primary constituent of sand grains is silicon dioxide, with formula SiO2.
Conglomerate; a clastic sedimentary rock composed of rounded pebbles and sand cemented together.
Most sand grains are made of quartz, also known as silica or silicon dioxide.
it depends what type of rock you have really, if you have a rock with crystals in it wont have sand in, if you have a pourous rock it wont have sand in either, but if you have a rock with grains you may find sand in the rock! Answered by a 12 year old lolz +++ Pretty much right - well done! You do have certain types of rocks ('sedimentary rocks') with sand in them, formed from earlier deposits of sand; but the sand itself is grains of hard minerals remaining from harder rocks that have been eroded away. So the rock with crystals does not have sand in it, but when weathering breaks that rock down, the crystals are left as grains of sand.
Sandstone is made up of lightly compacted or cemented grains of sand. It should feel gritty to the finger and the grains should be visible. The grains will be mainly silica grains. [Finer grained material would be a siltstone, of which slate is a metamorphosed variety. ]
Sand can be identified by what it is made of and what size the grains are. This can usually be done by the human eye.
No, sand is not a liquid. Sand is a solid material made up of small grains of rock and mineral particles.
Small particles of sand are commonly referred to as "sand grains." These grains are typically composed of mineral materials, predominantly quartz, and vary in size from 0.0625 mm to 2 mm in diameter. Sand grains can be formed through the weathering and erosion of rocks and are a fundamental component of various geological and ecological systems.
sandstone
Lithification is the compaction of materials into a sedimentary rock, such as sandstone.