Fine particles of stone, esp. of siliceous stone, but not reduced to dust; comminuted stone in the form of loose grains, which are not coherent when wet.

A single particle of such stone.

Tracts of land consisting of sand, like the deserts of Arabia and Africa; also, extensive tracts of sand exposed by the ebb of the tide.

An UNCONSOLIDATED (geologically) mixture of inorganic SOIL (that may include disintegrated shells and coral) consisting of small but easily distinguishable grains ranging in size from about .062 mm to 2.0 mm.

High grade, iron-free silica (sand) is required to make optical glass. Aeolian sand is considered one of the best types of sand for making optical glass. Other ingredients include calcite (for lime or calcium oxide), zinc oxide, lead oxide, soda ash, potassium nitrate, hydrated alumina, borax and boric acid.

the main silica ingredient in the manufacture of glass.

Filter Filter using sand as a filter medium.

The filter medium used by a sand filter. It usually refers to quartz or silica, but may also refer to zeolites.

There are several grades of sand used in building work. Sharp or concreting sand is used to form a base on which concrete is laid (you can usually see little flakes of flint in it). Rendering sand is used for covering brick and blockwork prior to plastering. Soft or building sand is used for making mortar. Silver or kiln dried sand is used to finish block paving.

(ASTM C125) That portion of an aggregate passing the No. 4 (4.76 mm) sieve and predominantly retained on the No. 200 (74 micron) sieve.

An aggregate for use in masonry mortar and grout. ASTM C144 and C404.