The company's main products include:corundum mining and processing,mining machinery, supporting equipment, safety drills and other three major categories of dozens of varieties. All of our products can be used for a variety of applications such as rock excavation, trenching, demolition and concrete and underwater cutting, tunneling and scaling. Provide full equipment and services for the comprehensive mechanized mining: boring machines, shearers, scraper conveyors. Customized product designs for roadheaders, supports, shearers, and scraper conveyors for different geological conditions.

  • Corundum main page - Department of Geological Sciences

    Ruby is red corundum; ... Corundum was the first gem mineral to be synthesized in the lab by a process known ... Mining on a small scale by native ...

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    Our Mine | TNG. Aappaluttoq is Greenlands first gem corundum mine; it was discovered and geologically defined by Company geologists between 2005-2012.

  • Ruby and Sapphire: Gems of the Mineral Corundum

    Red corundum is a ruby. Blue is a sapphire. ... and many of the gems are broken during the mining process. Fortunately, corundum is very hard and resistant to weathering.

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    In corundum. Artificial corundum may be produced as a specialty product, as for gem use, by slow accretion and controlled growth on a boule in an oxyhydrogen flame. This procedure is known as the Verneuil process (q.v.).

  • Corundum | mineral | Britannica.com

    Corundum: Corundum, naturally occurring aluminum oxide mineral (Al2O3) that is, after diamond, the hardest known natural substance. ... and chemical processing. ...

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