There are about 6,000 different types of minerals, but only a couple hundred are gemstones. Learn more about these special minerals and how someone like you can find your own gemstone. Science Trek is ...

Test your rock & mineral smarts—are you a Rock Star? Think you know rocks and minerals? Take the Science Trek quiz! Test your smarts on gold, salt, Earth’s oldest rocks, gemstones on Mars, and the ...

Researchers say they might have discovered the oldest rocks on Earth. The rocks in question are a belt of swirly, stripe-covered rocks found in the northeastern reaches of Canada. These rocks appear ...