From rubies to painite, coltan to diamonds, nature produces incredible minerals. Whether they are made into dazzling baubles or used in rechargeable batteries, the harvesting of these natural treasures can be damaging to the environment, human health and human rights. Many of these minerals are mined in war zones or seized by militant groups, making them conflict minerals.
Check out our slideshow of a sampling of some of the world's most valuable minerals. As always, we want to hear from you in the comments.