I have a vs 641.4ct gemstone (untreated) would It be worth much.
Quartz is the mineral that has the best combination of durability and abundance, so much sand is quartz. It is hard and common, so it must be a typical component of cement.
Quartz sand is simply sand (which is any particle that is between 2 mm and .0625 mm in size) that is made of quartz (which is a mineral that is composed of silica, SiO2). You discover it by looking for it. Commonly, beach , river and dune deposits are rich in quartz sand. Quartz sand is desirable in the cement industry because quartz silica is non-reactive with the cement in concrete. This means that when you mix the sand in with the cement, gravel, and water, it won't react and break the concrete down.
