Monday, 18 March 2013

Natural Blue Diamonds: Most Precious Gemstones

The word 'diamond' is derived from an ancient Greek word. Diamonds are the hardest known naturally occurring substance on earth. These highly priced gemstones are known for their beauty, durability and strength. The hardness of diamonds depends on their degree of purity. Pure and flawless diamonds exhibit higher degree of hardness. The precious gemstones show extraordinary optical characteristics.
They appear clear, transparent and colorless. The treasured gemstones are widely used in jewelry, including broaches, necklaces, earrings and rings. Apart from existing in colorless form, diamonds also exist in colored form. Some colored diamonds are yellow, brown, green, purple, orange, red, pink, black and natural blue diamonds.
Colored diamonds are formed due to the presence of impurities in the crystal lattice. Natural blue diamonds are formed due to the presence of boron in the structure. The hues of blue vary depending on the amount of boron present. The intensity of blue color increases with increase in amount of boron. Different hues of blue found in natural blue diamonds are fancy blue, fancy dark blue, fancy light blue, fancy vivid blue, light blue, greenish blue, intense blue and deep grayish blue.
Natural blue diamonds are the rarest, most valuable and expensive. These colored gemstones account for less than 0.1 percent of the total diamonds produced across the world. These precious gemstones are valued more because of their rarity, legendary timeless mystique and regal beauty. These valuable gemstones were used in necklaces, crowns and other royal styled jewelry items worn by kings, queens and aristocrats. These blue colored gemstones symbolize calmness and serenity. They are considered a symbol of classic and sophisticated elegance.
These colored gemstones are very expensive. They can be priced at $550,000 to $580,000 per carat. Further, the value of these precious gemstones increases with the increase in purity and intensity of the color. The most valuable hues of blue are fancy, fancy vivid and fancy intense blue. A fancy light blue colored diamond can cost up to $70,000.
The most famous natural blue diamond in the world is the Hope diamond. The largest blue diamond originally weighed 112.25 carats when it was found in Golconda, India in early 1600s. The cut weight of the gemstone is 45.52 carats. The diamond is named after King Henry Philip Hope. The gemstone is known for its notorious past. The diamond was sold tothe King Louis XIV of France and it became a part of French Royal Treasury. The gemstone is now displayed in the Smithsonian Institution in Washington D.C.
Other famous blue diamonds are Orlov diamond and Idol's Eye. These gemstones were stolen from the statues of deities. Another famous blue diamond is the Wittelsbach Diamond. The stone that once belonged to the King of Spain, weighs 35.56-carat. The gemstone was sold for $24 million at a Christie's auction.

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