Cinnabar

Cinnabar is a really pretty red rock that can look a lot like candy. But you shouldn't eat it, because it's actually a special type of mineral that can be dangerous if you swallow it or breathe in the dust. People have used cinnabar for thousands of years to make a special shiny red powder called mercury sulfide. They use the powder to make paint and to decorate things like pottery and jewelry. But again, it's important to be careful and not put it in your mouth or nose!