Sand

upright=1.35|thumb|Sand dunes in the [[Idehan Ubari, Libya]] thumb|Depiction of sands: glass, dune, quartz, volcanic, biogenic coral, pink coral,volcanic, garnet, olivine.Samples are from the Gobi Desert, [[Estonia, Hawaii and the mainland United States. (1×1 cm each)]]

thumb|right|Quicksand and a warning sign about it at a gravel quarry in England thumb|Quicksand on the River Thames|Thames Quicksand, also known as sinking sand, is a colloid consisting of fine granular material (such as sand, silt or clay) and water. It forms in saturated loose sand when the sand is suddenly agitated. When water in the sand cannot escape, it creates a liquefied soil that loses strength and cannot support weight. Quicksand can form in standing water or in upward flowing water (as from an artesian spring). In the case of upward-flowing water, forces oppose the force of gravity

thumb|250px|Children Play (activity)|play in a communal sandbox

right|thumb|Sandboarding in Dubai, [[United Arab Emirates]]

work by Archimedes

container used in locomotives to drop sand on the rail to improve traction

phenomena of sand that produces sound

church in Skagen, Denmark

thumb | right Psammite (Greek: psammitēs "(made) from sand", from psammos "sand") is a general term for sandstone. It is equivalent to the Latin-derived term arenite and is commonly used in various publications to describe a metamorphosed sedimentary rock with a dominantly sandstone protolith. In Europe, this term was formerly used for a fine-grained, fissile, clayey sandstone. Pettijohn gives the following descriptive terms based on grain size, avoiding the use of terms such as "clay" or "argillaceous", which carry an implication of chemical composition:

Black-colored rock and mineral particles

type of filter used in water purification technology

water purification device

REDIRECT Shoal

cone of sand formed by the ejection of sand onto a surface from a central point by water under pressure

sand coated with a hydrophobic compound

practice that is used to extract sand

thumb|Iron sand from Phoenix, Arizona, attracted to a magnet

coastal protection project in South Holland, the Netherlands

table using constrained sand for modelling or educational purposes

a sand that when moistened and compressed or oiled or heated tends to pack well and hold its shape

Skiing on the sand dunes

natural coastline in Tuscany, Italy

Sand contaminated by weapon projectiles