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 ...

Discover how rocks, minerals & the rock cycle change your world. Join the Science Trek team to explore rocks and minerals! Discover how the Earth formed, the three types of rocks, the rock cycle, and ...

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 ...

Deondre Smith Jr., 9, and his brother Devonne, 7, searched for their favorite rock Friday among thousands for sale at the opening day of the Roxy Ann Gem & Mineral Show in southern Oregon’s Central ...