The blue diamond market has always been strong and stable. There seems to be an insatiable appetite for fancy color diamonds and blue diamonds in particular since they are among the rarest diamond color along with purple, green and red. This is the kind of asset that has seen no price depreciations and is a unique investment opportunity. Prices rise and supply is limited, which make blue diamond highly desirable.

In the past, India was the main producer of colored diamonds including blue diamond. Today, South Africa has taken the lead in the production of blue diamonds. Gray-blue diamonds have been coming from Australia. If you are looking for a rich sapphire blue you will be disappointed. But if you are looking for a combination of moderate blue and unique brilliance, then the blue diamond has no peer. Stones with exceptional hues are far rarer among diamonds than sapphires. One of the reasons for the confusion about the color of blue diamonds is possibly the Hope diamond. This 45.52 carat diamond has a highly unusual inky blue color and is the most famous gem in America and perhaps the world. This gem is the exception not the norm.

The color in a blue diamond is a result of trace impurities of the element Boron. Typically blue diamonds contain a secondary color, such as grays or greens. This gives the blue diamond a softer not lighter color. Natural blue diamonds have always been a favorite among the rich and powerful. Auction prices keep setting new records and in 2007, one of the rarest gemstones in the world, a 6.04 ct Emerald cut, Fancy Vivid Blue flawless diamond sold for a record price of $7.98 million at Sotheby's in Hong Kong. That is $1.32 million per carat.

Current technology has made it possible to change the color of diamonds. A blue diamond that has been enhanced is far more affordable that a natural blue diamond. The enhancement is stable and the color is wonderful. If you truly want a natural blue diamond be sure to get a lab report to back up the price you will pay. That document is your proof of a natural rare blue diamond. Without it you cannot be sure of the origin of your gem's color.