A blue diamond is a blue diamond, the main component of which is carbon. Blue diamonds are blue because boron atoms create an acceptor energy band in the diamond's crystal, which absorbs near-infrared radiation and long waves, thus giving the diamond its blue color. Blue diamonds, unlike all other colors of diamonds, contain traces of boron during their formation and have the property of conducting electricity. Blue diamonds are rare and expensive.
[Origin].
①India
India's early discovery of many famous and historic blue diamonds, such as the discovery of blue diamonds in Hyderabad, India "hope".
②South Africa
Cullinan Diamond Mine is one of the most famous diamond mines in the world, which has produced the world's largest raw natural diamond, the 3,106-carat Cullinan Diamond.
③Australia
Australia's Argyle Mine is the world's largest supplier of diamonds, with the majority of the 1% of diamonds mined being blue diamonds with hydrogen defects.
[color grading].
Blue diamonds are color graded as:
Faint Blue
Very Light Blue
Light Blue
Fancy Light Blue
Fancy Blue
Fancy intense blue
Fancy Vivid Blue
Fancy Deep Blue
Fancy dark blue
[Selection of blue diamonds]
Since natural blue diamonds are very rare, they are valued quite highly. Although blue diamonds are higher in price than other colored diamonds, we assemble the color, color intensity, carat weight, clarity and other comprehensive considerations when determining the price of blue diamonds.
①Color
For colored diamonds, color is the most important factor, and blue diamonds are no exception. For blue diamonds, the importance of cut is related to its color, which is the main factor in determining its value, the more intense the blue diamond, the higher the price.
②Weight
Natural blue diamonds are very rare, and their price increases geometrically for larger carat weights.
Carat unit price of more than 3 million U.S. dollars in four blue diamond auction, there are three more than 10 ct. 3 to 6 carats will have the strength to set a world record, and those 10 carats or even more blue diamonds is absolutely. The blue diamonds of 10 carats or more are extremely rare and hard to find.
Cut
Diamond value measurement of the 4c standard, the only cut is directly affected by human influence, the cut of the degree of excellence directly affects the diamond out of the fire, flash.
Diamond cut is rated in 5 levels from excellent to poor.
Clarity
Blue diamonds hide flaws to some extent due to their color.
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