Hi. I''m interested in purchasing a loose color treated blue diamond. My understanding of them is that they are natural diamonds of lower quality and they are lab treated so that they are blue (or whatever other color you''re interested in). What else do I need to know about them? And where can I find a reasonably priced one? Everywhere I look, they seem to be way too underpriced to be what I''m looking for (i.e. $300 for 1/2 carat). I live in Southern California and am not opposed to purchasing one from the internet...as long as I can look at it first. Any help anyone could give me would be greatly appreciated. Thank you soooooo much!