If you are looking for blue diamonds, you will have to decide which type you are going to get: natural or man-made. Natural blue diamonds are extremely rare and therefore extremely expensive. The blue color in the diamond is caused by chemical impurities, usually, boron, or hydrogen. The diamonds range in color from a very light blue tint, to a deep royal blue. This is due to varying amounts of the chemicals in the diamond.

The most expensive diamonds are the deepest colored ones. Most of the colored stones are uneven or multicolored. These are worth much less.

A blue diamond engagement ring will cost you much more than a traditional diamond ring-try ten to fifty times for the same quality stone! This is why most normal people cannot afford a natural blue diamond.

This is the reason why so many people prefer man-made color diamonds. They can look very similar to the natural ones, so most people (except your jeweler!) would know the difference. A normal natural diamond can be color treated with irradiation and intense heat. This process makes the diamond an even blue, beautiful, and affordable to many more people.