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 ...

Thundereggs look like regular rocks from the outside, but contain intricate and colorful mineral patterns inside — often made ...

All rocks are made of one or more minerals. Minerals are solid, naturally occurring substances with well-defined crystal structure and chemical compositions. Rock and mineral collecting is a popular ...

The phrase “eat dirt” has never been complimentary, but there sure are some tasty-looking rocks at the Arizona Mining and Mineral Museum on Washington Street. The museum’s “Banquet of Rocks” display ...

Gems and minerals are sought for their vibrant colors, rarity and, of course, their sparkle. But for Craig Thomas, chair of the Indian Mounds Rock and Mineral Club, gems are a lot more. Thomas has ...