Got blood on your cell phone?

Beware - the maker of your mobile phone may not want you to know about this

Hey, your cell phone, laptop or tablet likely has a rare metallic ore called coltan in it. Now maybe, you’ve never heard of coltan, but your device probably wouldn’t even turn on without it.

A man displays coltan rocks at a town in the eastern region of the Democratic Republic of Congo. Photo — Reuters/Baz Ratner