Rocks have not changed in 90 years, and neither have the type of people who would join the San Francisco Gem & Mineral Society, which started in 1935 for the hobby of rock cutting and polishing and ...

The advancement of rock cutting and drilling technologies is central to modern resource extraction and civil engineering practices. Significant progress has been achieved through the integration of ...

Joe Cota and Brad Newport, two Linn County collectors of petrified wood, will appear next month on a Travel Channel program called "The Best Places to Find Cash and Treasures." Hosted by Kirsten Gum, ...