Have you ever found a Petoskey stone on a trip up north? They are so spectacularly beautiful that it’s no wonder they are designated as Michigan’s State Stone. The only problem with Petoskey stones is ...

Q: I need to learn how to polish marble. There is some marble flooring in my house that has seen better days. The scratches aren’t too deep, but they look bad. I also had to cut a piece of marble and ...

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A diamond cutter’s ultimate quest is to optimise the yield, beauty and profit from a rough stone. New technology is enabling manufacturers to map rough diamonds and assess their polished potential ...

Chinese craftsmen used diamonds and sapphire to polish tools thousands of years earlier than previously believed, according to new research findings. Robert Siegel talks with Peter Lu, a physics ...

Researchers have uncovered strong evidence that the ancient Chinese used diamonds to grind and polish ceremonial stone burial axes as long as 6,000 years ago -– and incredibly, did so with a level of ...