Finding the rough diamonds is only the first step. Once the diamonds have been mined and processed out of the Kimberlite rocks in which they are imbedded, the rough crystals are sorted and categorized according to their size, colour, shape and other characteristics. From this point, a diamond can follow one of two routes.
The most common route is through the channels of De Beers or other important miners such as Rio Tinto (Australia) and BHP Billiton (Canada). Many people are familiar with De Beers mainly because of their advertisements, commercials and famous motto: "A diamond is forever."
Every year, De Beers’ marketing arm, the Diamond Trading Corporation (DTC), holds ten week-long selling sessions (“sights”). Only a handful of diamond manufacturers from around the world are allowed to attend these sights as they are invitation only. These sight holders may choose to cut the rough diamonds they buy themselves, or they may choose to sell some of the rough diamonds to smaller manufacturers.
On their part, the smaller manufacturers cut the rough diamonds and sell the polished gems either to jewelry manufacturers (who set the diamonds into finished pieces of jewelry, which they later sell to jewelry retailers), or to diamond wholesalers (who then, in turn, sell the diamonds to diamond retailers).
In the less common route from mine to market, some independent miners elect not to sell their mine production to the DeBeers group. Instead, they offer newly mined diamonds directly to other world buyers. These buyers, in turn, may chose to cut and sell the diamonds themselves, or pass the diamonds along within the industry in a manner similar to that described above.
With the modern rise of online sales, diamonds and diamond jewelry have now also found their way to the internet. Baunat offers diamonds online which are always processed in jewels. Baunat makes it very easy to safely buy diamond rings online and this at the best possible prices.