LEXINGTON, Ky. (WKYT) - Coal has been a hallmark of the Kentucky mining industry for years, and for 25 of those years, Kentucky has celebrated coal as its state mineral. There is just one problem: ...

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 ...

If you draw with a pencil, you can tell how soft the graphite inside is. Pieces of graphite break off to leave the pencil mark. But can you imagine drawing with a diamond? Diamonds and graphite are ...

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. Minerals are the non-living building blocks of the natural world ...