Experience is Critical
The process of buying rough diamond, (commonly called "rough"), takes all of the expertise for buying polished goods, and then additional expertise required for buying it in the original raw state. Rough is a commodity that only the very experienced can ever profit from; the inexperienced will lose most of the time. Typically, outside of the regular trading centers, unwary rough buyers are purchasing overpriced goods, or getting unintentionally involved in scams. Even if an inexperienced buyer has the "right contacts", it is still necessary for him to know the value of the goods hands down. The most honest and reputable rough dealer will always try to get the highest return possible. If the buyer is not savvy enough to buy the goods at a fair price, then the only person to blame is the buyer himself.