Crystals are usually white, but they can be red, green, aqua, and lots more colors. They are a type of rock. They are very rare, and shiny. There are lots of different types of crystals even magnet types that are black. Some crystals when you look in them you can see right through them, and you can see double when you look through them. Amber is a type of crystal that is from a tree. Gold and silver is even a type of crystal.images.jpg<-------Here is a guy mining for crystals.