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Alumina

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Alumina, or aluminium oxide (aluminum oxide), is better known in the mineral world as corundum.

Because of its high melting point and resistance to chemicals it is NOT used as an ore of aluminium - that is bauxite.


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Properties of AluminaHide

Formula:
Al2O3
Hardness:
Density:
3.98 - 4.1 g/cm3 (Measured)    3.997 g/cm3 (Calculated)

Uses of AluminaHide

It has many uses commercially, depending on the grade of material that is being mined:

As an abrasive - see emery.
As a refactory material - due to the high melting point of 2,072 °C (3,762 °F)
As a gemstone - ruby and sapphire are gem varieties of corundum.

Other Commodities associated with Alumina *Hide

CommodityAssociated LocalitiesTotal Localities% Association (commodity)% Association (Alumina)
Gemstones35140.58% of all Gemstones deposits have Alumina.7.50% of all Alumina deposits have Gemstones.
Gold220,6610.01% of all Gold deposits have Alumina.5.00% of all Alumina deposits have Gold.
Asbestos22040.98% of all Asbestos deposits have Alumina.5.00% of all Alumina deposits have Asbestos.
Vermiculite21991.01% of all Vermiculite deposits have Alumina.5.00% of all Alumina deposits have Vermiculite.
Copper18,1570.01% of all Copper deposits have Alumina.2.50% of all Alumina deposits have Copper.
Molybdenum11,0050.10% of all Molybdenum deposits have Alumina.2.50% of all Alumina deposits have Molybdenum.
Kyanite11370.73% of all Kyanite deposits have Alumina.2.50% of all Alumina deposits have Kyanite.
Pyrophyllite1714.29% of all Pyrophyllite deposits have Alumina.2.50% of all Alumina deposits have Pyrophyllite.
* in exploitable quantities, based on associations listed on mindat.org

Deposits of AluminaHide

This map shows a selection of deposits that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates.
USA
 
  • Colorado
    • Gilpin Co.
      • Independence District (Perigo District)
  • Idaho
    • Adams Co.
      • Meadows District
    • Idaho Co.
      • Warren District (Marshall District)
  • Montana
    • Beaverhead Co.
      • Ruby Range
    • Deer Lodge Co.
      • Orofino District
        • Dry Cottonwood Creek
    • Gallatin Co.
    • Granite Co.
      • Rock Creek District
      • Sapphire Mountains Area
    • Madison Co.
    • Powell Co.
      • Zosell District (Emery District)
  • North Carolina
    • Jackson Co.
      • Sapphire Valley
    • Macon Co.
      • Cowee Valley
        • Ellijay District
    • Madison Co.
      • Canton-Democrat
    • Swain Co.
    • Transylvania Co.
      • Lake Toxaway
  • Oregon
    • Douglas Co.
    • Linn Co.
    • Wallowa Co.
      • Wallowa Range District
  • South Carolina
    • Cherokee Co.
      • Gaffney Area
    • Edgefield Co.
    • York Co.
      • Clover Area
  • Virginia
    • Henry Co.
  • Wyoming
    • Albany Co.
    • Carbon Co.
    • Fremont Co.
Mineral and/or Locality  
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