What is "emery"

Corundum \Co*run"dum\ (k[-o]*r[u^]n"d[u^]m), n.; pl. Corundums (k[-o]*r[u^]n"d[u^]mz). [Also corindon.] [From Hind. kurand corundum stone.] (Min.) The mineral alumina ( Al2O3), as found native in a crystalline state. Transparent varieties are used as gemstones, including sapphire, which is the fine blue variety; the oriental ruby, or red sapphire; the oriental amethyst, or purple sapphire; and adamantine spar, the hair-brown variety. It is the hardest substance found native, next to the diamond.

Note: The name corundum is sometimes restricted to the non-transparent or coarser kinds. Emery is a dark-colored granular variety, usually admixed with magnetic iron ore.

Emery \Em"er*y\, n. [F. ['e]meri, earlier ['e]meril, It. smeriglio, fr. Gr. ?, ?, ?, cf. ? to wipe; perh. akin to E. smear. Cf. Emeril.] (Min.) Corundum in the form of grains or powder, used in the arts for grinding and polishing hard substances. Native emery is mixed with more or less magnetic iron. See the Note under Corundum.

Emery board, cardboard pulp mixed with emery and molded into convenient.

Emery cloth or Emery paper, cloth or paper on which the powder of emery is spread and glued for scouring and polishing.

Emery wheel, a wheel containing emery, or having a surface of emery. In machine shops, it is sometimes called a buff wheel, and by the manufacturers of cutlery, a glazer. [1913 Webster] ||

granular mixture used as an abrasive, late 15c., from Middle French émeri, from Old French esmeril, from Italian smeriglo, from Vulgar Latin *smyrilium, from Greek smyris "abrasive powder" used for rubbing and polishing, probably a non-Greek word, perhaps from a Semitic source. Emery board attested from 1725.

n. (context mineral English) An impure type of corundum, often used for sanding or polishing.

n. a hard gary-black mineral consisting of corundum and either hematite or magnetite; used as an abrasive (especially as a coating on paper)

Emery may refer to:

• Emery (rock)
  • Emery paper
  • Emery board, nail filers
  • Emery bag, a small bag filled with emery, sometimes attached to a pincushion, to sharpen and polish needles
• Emery (band), a post-hardcore band from Rock Hill, South Carolina
• Emery Theatre, a historic multi-purpose theatre in Cincinnati, Ohio
• Emery Worldwide, a cargo airline

Emery may be a surname or given name.

Emery is an American post-hardcore band from Seattle, Washington currently signed to BadChristian Music. Emery was founded in Rock Hill, South Carolina by Toby Morrell, Devin Shelton, Matt Carter, Josh Head, Joel Green and Seth Studley, and moved to Seattle in order to reach a more music centered scene.

Before signing with Tooth & Nail Records, Emery recorded two EPs, The Columbus EEP Thee and The Weak's End demo that they used to attract attention from labels. With Tooth & Nail, they have recorded five studio albums, and two EPs. The Weak's End, their debut album, was released in 2004, followed by The Question in 2005 and I'm Only A Man in 2007. The latter fulfilled Emery's contract with Tooth & Nail. However, the band re-signed with the label and released ...In Shallow Seas We Sail on June 2, 2009. The album, We Do What We Want, was released on March 29, 2011, and the band's most recent album, You Were Never Alone, was released on May 19, 2015 via BadChristian Music.

Emery (or corundite) is a dark granular rock used to make abrasive powder. Emery is named after Cape Emeri, Island of Naxos, where it was first discovered. It largely consists of the mineral corundum ( aluminium oxide), mixed with other species such as the iron-bearing spinels, hercynite, and magnetite, and also rutile ( titania). Industrial emery may contain a variety of other minerals and synthetic compounds such as magnesia, mullite, and silica.

It is black or dark grey in colour, less dense than translucent-brown corundum with a specific gravity of between 3.5 and 3.8. Because it can be a mixture of minerals, no definite Mohs hardness can be assigned: the hardness of corundum is 9 and that of some spinel-group minerals is near 8, but the hardness of others such as magnetite is near 6.

Crushed or naturally eroded emery (known as black sand) is used as an abrasive — for example, on an emery board and emery cloth, as a traction enhancer in asphalt and tarmac mixtures.

Turkey and Greece are the main suppliers of the world's emery. These two countries produced about 17,500 tons of the mineral in 1987.

The Greek island of Naxos used to be the main source of this industrially important rock type. It has been mined on the eastern side of Naxos for well over two thousand years until recent times. However, demand for emery has decreased with the development of sintered carbide and oxide materials as abrasives.

A small quantity of emery is used in coated abrasive products, but its main use in the United States is wear-resistant floors and pavements. Many tons are shipped to Asia to be used in grinding rice.

The Occupational Safety and Health Administration in the US has set permissible exposure limits for emery in the workplace: TWA 15 mg/m total exposure and TWA 5 mg/m respiratory exposure.