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 ...

Rocks and minerals hold precious clues about how Earth formed and evolved over billions of years — but what is the difference between the two? In essence, rocks are aggregates of two or more minerals.

Forbes contributors publish independent expert analyses and insights. David Bressan is a geologist who covers curiosities about Earth. There would be no bright and colorful fireworks without rocks and ...