For years I have heard jewelry sales people refer to the black spots you see in diamonds as "carbon spots." This terminology is completely incorrect. Diamonds, are indeed made up of 100% carbon, so to refer to the black spots as carbon spots is definitely not right. The spots you sometimes see in diamonds that appear black are actually graphite. It just so happens that graphite is also made up of 100% carbon. I know what you're thinking, if graphite and diamonds are made up of the same thing then how come diamonds are next to impossible to break and you can break graphite with your bare hands. Well, the answer is on the atomic level. To put it simply diamonds form much lower in the earth then graphite does so there atomic structure is much tighter. As, diamonds are pushed up to the surface they sometimes mix with graphite as they get closer to the earth's surface. So, next time a sales person refers to these as "carbon spots" you will have the knowledge to correct them. Remember, before ever making a purchase inform yourself so you know whether you're spending your money wisely. Don't rely on other people to give you the correct information. I hope you all have enjoyed this little tiny piece of information and until next time remember guys, when you're in the fire, put some ice on it. :o)