When choosing a ring, make sure you select your diamonds before you select the ring itself as sometimes certain cuts can only accommodate certain diamonds depending on their size and shape. When choosing a ring, there are some terminology to learn as well such as the shank and the head. The shank being the band that wraps around the finger and the head being the setting for the stone.
There are several different settings in regarding to how a diamond is actually set in the ring. A prong setting is one of the most common and involves the diamond sitting in the middle of three prongs. Little metal claws bend over the stone and hold it securely in place. This setting resents the diamond, making it more prominent then any other setting. This popular setting is easy to adjust to any size diamond you may purchase or if you later decide to change the ring.
In a bezel setting precious metal wraps around the diamond to hold it in place. It is more labor intensive since it must be fashioned around the diamond itself and then fastened to the shank. once the diamond is set the top of the bezel is gently hammered to fit over the diamond. There is also the option of a half bezel, where only a part of the diamond is held by a bezel.
A channel setting protects the diamond more so then the other settings as the edges are completely encased and do not suffer from regular wear and tear. Metal bars rise to the top of the stone and have a channel that runs between them where a girdle is fitted so that the stones rest securely inside of the girdle. This setting works greatly if you have a line of diamonds.