Loose diamonds are the hardest naturally made substance on earth. This is what makes them great for jewelry, but also makes them great for other things, too. Industrial companies that drill through the earth may sometimes use diamonds since they are so hard. If you are imagining a huge diamond shaped like a drill bit, this is not very accurate! These companies simply incorporate diamonds into their drill bits in order to make them more durable. Dentists may also use diamonds in order to drill through teeth. Human teeth are pretty durable so it will take some pretty tough material to drill through them or to remove them if necessary. People who are getting veneers may end up being drilled on with diamonds. How fancy is that?
Loose diamonds have to come a long way before you see them in your local jewelry store. They actually come from deep within the earth: about one hundred miles beneath, to be more clear! They begin as carbon molecules and since they are exposed to such extreme conditions (like heat and pressure), they bond together in a lattice-structure that make them more durable than ever so they can survive these conditions. You may be wondering how they get from the center of the earth to closer to the surface though, and the answer is volcanic eruptions. These eruptions thrust the carbon molecules that have since turned to rough diamonds closer toward the surface of the earth so diamond miners can only dig a couple hundred feet instead of miles to find their prizes. Once the loose diamonds are excavated, they will be cut, polished and sold to the massive diamond distributors that provide them to your local jewelry stores for you to enjoy.