Geode is a type of sedimentary and volcanic rock that is hollow, vaguely circular rock, in which masses of mineral matter (which may include crystals) are sequestered. The term 'Geodes' was derived ...

Rock candy was one of the coolest kinds of candy you could eat as a kid, right up there with gummy worms. They made it look like you were eating expensive crystals, and if that wasn't enough for you, ...