They will typically run in the hundreds of thousands of dollars per carat range.

[5] Despite decades of research, scientists are still inconclusive to the source of red color in diamonds.

The most accepted theory is during the diamond's formation, plastic deformation is caused in the crystal lattice structure.

Some of the atoms are misplaced as the diamond moves up through its kimberlite deposit, and the intense pressure of this movement causes the varying shades of pinks, or reds, to appear.

The next most important attribute is the diamond's carat weight, followed by its clarity, and cut.

[12] In order to determine the clarity of a diamond, it is examined under a loupe, which is magnification device that enlarges the visual field 10X.

Most red diamonds fall within the range of VS1 – SI2 due to the nature of how they were formed.

Only a handful of red diamonds are discovered on an annual basis throughout the world, and most of them do not exceed 1 carat.

[15] Most red diamonds display fluorescence when placed under UV light.

This is in fact completely arbitrary, as the blue glow may or may not appeal to a buyer, but it certainly has no bearing on the composition, durability or beauty of a diamond.

Just like with clarity, in the case of fancy color diamonds, this is not a detracting characteristic if it is present.

If a red diamond has fluorescence, it will not add or detract from its value or resale value in any way.

In the United States, when a buyer is seriously interested in the purchase of a very expensive diamond, they will often ask for the diamond to be examined by the Gemological Institute of America (GIA) to ascertain that it is genuine.