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.

Congo or Brazilian Citrine - what's the difference?