The Petoskey Stone Polishing Class will provide the opportunity to learn how to polish Petoskey stones and find their unique patterns and colors. The class, offered by the Chippewa River District ...

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 ...

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 ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Leslie R. Stone, Sr. (Leslie Roland ...