A natural blue diamond is a rare diamond and will be very pricey. In April 2010, a five-carat vivid blue stone was auctioned in Hong Kong with estimated bidding to range between US$4.6-$5.8 million.
In May 2009, Sotheby's Geneva auctioned a 7.03 carat, internally flawless, fancy vivid blue stone for US $9.48 million.
Read more about these stones, below.
You can purchase such a diamond of that approximate weight today on Blue Nile and pay between US$3,389 and US$12,223, depending on the quality of the cut, clarity and colour that you want.
First, you'd have to find such a diamond. This size and colour are uncommon, blue being one of the rarest diamond colours. Recently (21Oct2010), the Bulgari Blue Diamond, "...a triangular 10.95 carat Fancy Vivid blue diamond, (the largest such blue diamond of this cut ever offered at auction)," sold for $15.7 million or $1.4 million per carat. (From The Telegraph, London.)
Today, on Blue Nile, you can purchase a J colour diamond of this approximate weight and pay between approximately US$30,000 and US$60,000, depending on the clarity and the cut that you want. The K colour is not listed on the Blue Nile site. Hearts and Arrows brand cuts are available at local jewelers, and you can find the answer you want for their cut and clarity there.
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You can complete your own research by visiting a Canadian jeweler that was in business in 1900, and exploring the records associated with the sale of any blue diamond.
A round diamond of this measurement weighs about .03 carats. Your local jeweler may have one for sale. The smallest weight diamond you can purchase today on Blue Nile weighs .23 carats and will cost US$272.
A diamond of this weight -- one carat, is available today on Blue Nile. You can pay between US$2,072 and US$23,403, depending on the cut, clarity, and colour you want for the diamond.
Blue diamonds are rarer and more valuable than red diamonds. The presence of the boron element in blue diamonds gives them their color, while red diamonds get their color from structural defects in the crystal lattice. Both colors are extremely rare and highly prized by collectors and investors.
If you choose an aftermarket distributor, the approximate cost is $200. If you choose a distributor from a Honda dealer, the approximate cost is $400. The approximate cost of labor is $75-$100.
The cost of a 14k diamond ring with a blue stone and 32 diamond chips can vary significantly based on the quality and size of the stones. Generally, prices for such a ring can range from a few hundred to several thousand dollars. It's best to consult a jeweler for an accurate estimate.
14 MillionAnother AnswerNatural blue diamonds are among the most rare of diamonds. First, you'd have to locate such a stone. Given its rarity, you would probably pay whatever the seller asked in terms of a price.(Today at Blue Nile -- where there are no blue diamonds listed -- you can buy a rare 1.4 carat Fancy Vivid Purplish Pink radiant-cut diamond for US$385,0000. A blue diamond with similar qualities would cost you more, again, if you could find one.)
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