'sand grains' is a correct and usable phrase in written English.
You can use it anytime you are referring to small grains of sand, such as "The sand grains felt rough between my toes."
Two sand grains, two meteorites, and two anomalous but similar isotopic measurements.
Sand grains or vegetable debris are added to cases to provide protection and rigidity.
For example, quartz arenites are rocks whose sand grains consist of at least 95 percent quartz.
However, the sand grains are not "glued together" by the water.
Some species are so small that they live in the spaces between sand grains.
Many species incorporate sand grains and other particles into the lorica for reinforcement.
Flowering Time: Mar--May(Jun) Note: Sand grains often stuck to glands.
Kinorhynchs feed on bacteria and tiny particles associated with sand grains.
The murmuring rises and falls while they divide up among themselves the sky, the shadows, the sand grains.
A sand castle is made of a network of sand grains glued together by very thin bridges of water.
Subarkose, variety of sandstone in which 5 25 percent of the sand grains are composed of feldspar.
