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Emery, or corundite, is a dark granular rock used to make an abrasive powder. The rock largely consists of corundum (aluminium oxide), mixed with other minerals. Industrial emery may contain a variety of other minerals and synthetic compounds. Crushed or naturally eroded emery (known as black sand) is used as an abrasive. Turkey and Greece are ...
The use of natural emery papers is rare today generally being replaced with silicon carbide or pure aluminium oxide papers. Emery cloth has the abrasives bonded to a fabric instead of a paper. The cloth is more tear resistant, flexible, and costly. Emery boards have applications similar to emery paper or cloth. It also has a use in modelling.
The oldest Precambrian rocks in Tanzania form the stable continental crust of the Tanzania Craton and date to the Archean more than 2.5 billion years ago. The craton includes the vestiges of two Archean orogenic belts, the Dodoman Belt in central Tanzania, and the Nyanzian-Kavirondian in the north.
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Boston Sand and Gravel owns railroad track from Ossipee to Rollinsford, New Hampshire, through its railroad subsidiary, the New Hampshire Northcoast Corporation. The location of its plant along the government-owned tracks in Charlestown provides easy access for its gravel trains, through an agreement to use the freight trackage rights kept by CSX .
Emery (band), a post-hardcore band from Rock Hill, South Carolina; Emery (name), people with the given or surname; Emery (rock), dark granular rock used to make an abrasive powder Emery board, a type of nail file coated with emery Emery ball, the use of an emery board to alter a sports ball; Emery cloth, an abrasive cloth coated in emery particles
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 [1] as well as for building projects. It is not cleaned or smoothed to the extent recreational play sand is. It is useful for drainage. [2]