Category Archives: Science

Corundum

Posted on December 19, 2006 by journalist

Corundum is the hardest mineral other than diamond. Ruby and sapphire are the most valuable corundum. Red corundum is ruby, other colors are called sapphires, but there is no clear border between the two. Light red, pink or violet corundums … Continue reading →

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How are diamonds mined?

Posted on December 6, 2006 by journalist

We seldom think about how the diamonds we wear came to us. Natural diamonds, as opposed to synthetic diamonds or fake diamonds, are mined from the earth. There are currently two methods of mining diamonds: Pipe Mining and Alluvial Mining … Continue reading →

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