sharp sand

{{further|Grus (geology)}}

Sharp sand, also known as grit sand or river sand and as builders' sand, concrete sand, or ASTM C33 when medium or coarse grain, is a gritty sand used in concrete and potting soil mixes or to loosen clay soil{{Cite web|url=https://davesgarden.com/guides/terms/go/805/#b|title=Definition of sharp sand|website=davesgarden.com}} as well as for building projects. It is not cleaned or smoothed to the extent recreational play sand is. It is useful for drainage.livingearth.net

Sharp Sand | Living Earth Texas It is an angular grained sand.{{Cite web|url=https://www.merriam-webster.com/dictionary/sharp+sand|title=Definition of SHARP SAND|website=www.merriam-webster.com}} It was used in the production of brass.{{Cite web|url=https://books.google.com/books?id=4OlTAAAAYAAJ&dq=sharp+sand&pg=PA493|title=London Encyclopaedia; Or, Universal Dictionary of Science, Art, Literature and Practical Mechanics: Comprising a Popular View of the Present State of Knowledge|date=November 16, 1829|publisher=Thomas Tegg|via=Google Books}} It is now used in the building trade. Sand and gravel ridges known as eskers are a frequently used source.{{Cite book|url=https://books.google.com/books?id=k7PNQolZtF4C&dq=sharp+sand&pg=PA35|title=Between rocks and hard places: discovering Ireland's northern landscapes|first=Paul|last=Lyle|date=October 27, 2010|publisher=Macmillan|isbn=9780337095870|via=Google Books}}