When we talk about jewelry, usually the first thing that pops up in your mind is diamond. For my friends, who are not in the industry, they often give me perplexed looks when I mention other types of jewelry that are out there. On the contrary, when I talk about diamond, they all know what it is. Everybody knows that diamond is expensive and has high market value. But only a handful of people knows where does diamond come from, what are its properties, and why is it so expensive?