Did you know some crystals are older than the dinosaurs, some rocks glow under ultraviolet light, and the device you're reading this on contains minerals? From ancient Earth to everyday technology, these 10 surprising crystal facts reveal just how fascinating the world of rocks, minerals, and gemstones really is. Whether you're a seasoned collector or simply curious, there's something here that just might surprise you.

What do Herkimer Diamonds, Lake Superior Agates, Oregon Sunstone, and Bisbee Turquoise have in common? They're among the most iconic rocks, minerals, gemstones, and fossils found in the United States. In celebration of America's 250th birthday, we're taking a coast-to-coast look at ten legendary specimens that have inspired collectors, rockhounds, and gemstone enthusiasts for generations.