Choosing a black diamond, or a Carbonado, is one of the most confusing and difficult things to do when looking for a ring. These black diamonds are a hot new fashion trend among brides to be, though it’s worth noting that due to a massive price variance, among other things, you really want to shop around before buying a particular stone.
The main problem with black diamonds is that more than 99.9% of black diamonds are simply coated or treated. This means that diamond cutters could polish industrial diamonds (worth cents, not dollars) coat them with a black lacquer and then market the resulting ‘black diamond’ to unsuspecting consumers at an extreme mark-up. If by any chance you have purchased one of these, an acid wash of any kind (spilling vinegar on your ring, for example), would cause the coat to dissolve, showing the true nature of the original diamond. Again, if you have purchased a treated black diamond, there’s no guarantee that the stone is a true diamond. Many unscrupulous jewellers peddle substitutes such as hematite to unsuspecting customers because even highly experienced jewellers can struggle to tell the two apart.