What is Silica Sand? (with pictures) wiseGEEK
Jul 09, 2020· Silica sand is used in industrial processing, to make glass, as fill, and to create molds and castings. A pile of silica sand. Sand is the general term for broken down granules of minerals or rocks, technically between about onesixteenth of a millimeter to two millimeters in diameter, falling between silt and gravel in the spectrum of sizes.