The Corundum Mine Trail in the Split Rock Lighthouse State Park along the North Shore is a very easy trail to hike, though the last stretch becomes a little difficult as it goes uphill.

Researchers at Heidelberg University are studying the formation of this characteristically blue-colored crystal in volcanic ...

THE three works cited below give much new and valuable information concerning the mode of occurrence, the processes of mining, and the uses of corundum. As the mineral is of growing economic value ...

The colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green. But have you ever wondered how they get those colors?

Thomas L. Watson, George Steiger, Titanium-bearing corundum spinellite (rock emery): a preliminary statement of its occurrence and composition in Virginia, Journal of the Washington Academy of ...

We're back in the museum for this week's episode of Mineral Monday to learn about the mineral corundum. While you may not know the mineral itself, you definitely know two of its crystal structures.

Sapphires are among the most precious gems, yet they consist solely of chemically 'contaminated' aluminum oxide, or corundum. It is widely assumed that these crystals with their characteristically ...