Here is our stand on clarity enhancement, we think the process is truly disruptive to the true nature of a real diamond made by nature. The reason we consider most clarity enhancement of diamonds to be bad, is that it is done by filling in surface cracks and fissures. If this could be done with diamond, by vapour deposition, then it would be almost imperceptible, undetectable, irreversible and stable, in which case, we would consider it as quite acceptable, but probably subject to disclosure rules. However, the filling material is not diamond, but usually a type of heavy glass. While we accept the arguments of those who carry out clarity enhancement, and those who actively market such stones, most of whom are probably quite honest, we believe that downstream from these reputable dealers, there are many people who would think nothing of failing to disclose the fact that the stone was enhanced, and we believe such failure to disclose to be fraudulent. If the carat weight of the diamond formed an important part of the contract, then because some of the weight would be non-diamond material, then any weight stated or estimated would be incorrect, having been artificially increased. Our other main objection is that the filling material has a much lower tolerance of high temperatures than diamond, so that when repair work is needed on fracture filled stones, the filling is very likely crack or melt, leaving the diamond's owner and the workshop in a difficult position, and neither with any recourse unless the original vendor or enhancer can be found, and is prepared to rectify the problem.