Full disclosure: I'm not a scientist and I don't want to take credit for the work of others. All I can do is read a bunch of sources, then put some of the facts together so you don't have to read all those sources yourself. The following is a paraphrasing -- the Turner "CliffsNotes" -- from several sources on a subject I love covering ... gemstones and jewelry! In today's blog, let's learn more about blue diamonds!
Only 1 out of 200,000 diamonds are blue. Like all other diamonds blue diamonds were formed billions of years ago when the element carbon was exposed to extreme heat and pressure deep in the earth's mantle. Clear (a/k/a white) diamonds are pure carbon. If traces of boron contaminate the carbon during its growth, a blue diamond is created. The industry calls all colored diamonds fancy diamonds.
Scientists are intrigued by the origin of blue diamonds because they hold many of the earth's secrets. Once an enchanting mystery, gemologists now think they understand how these extremely rare blue gemstones came about. It also gives us clues about the evolution of the earth, itself. After the Gemological Institute of America conducted studies using lasers to uncover impurities (minerals) that got trapped inside blue diamonds, the experts started to assemble a picture of how and where blue diamonds were formed.
Based on their discoveries, scientists know that blue diamonds were formed much deeper in the earth (below 410 miles) than other diamonds (formed between 90 miles - 125 miles below the earth's surface). It is believed that boron in the ocean floor "was pushed down when plates that make up the Earth's crust collided," making the diamonds appear blue. (According to researchers, boron lets the diamonds "absorb some red light, so the diamonds look blue.")Diamond deposits formed very deep within the earth eventually reach the surface by volcanic eruptions.Now we know how some of the big rare blue gemstones such as the Hope Diamond and Oppenheimer Diamond were born. Billions of years ago Mother Nature had to come together in just the right way to produce them and for humans to find and have them all these years later.
Both blue and white diamonds are graded using the 4 Cs: cut, clarity, color, and carat. But! Blue diamonds are so rare and in demand for their beauty, that they tend to cost more per carat than white diamonds. The blue diamonds that become well-known and fetch millions of dollars at auctions invoke excitement and fame because their unique size, color, and clarity are so rare.As it happens I don't have any blue diamond jewelry. Diamonds are valued for their sparkle and brilliance. Colored gemstones will have less sparkle than white diamonds. Their value is determined by the vividness, tone, and saturation of their color. Vivid blue diamonds are so rare and expensive that we get less for the money than if we buy white (a/k/a clear) diamonds. I have never been tempted to buy blue diamonds because blue diamonds aren't very budget-friendly, and I don't want to spend a lot of money on faint or tiny blue diamonds! I'd rather compromise by buying a commercial-grade sapphire.
The good news is scientists can make blue diamonds in a lab. Laboratory diamonds are grown in an artificial setting that mimics how diamonds grow naturally below the earth's mantle. Lab-grown diamonds are getting better and more plentiful all the time, which is lowering the prices per carat of all diamonds! The color of these blue diamond earrings looks enhanced. You never see such dazzling blue diamonds in jewelry display cases! They did, however, inspire me to write the blog. Wouldn't we love to own real blue diamond earrings just like them? Of course we would!:)💙🔵
The color of these blue diamond earrings looks enhanced. You never see such dazzling blue diamonds in jewelry display cases! They did, however, inspire me to write the blog. Wouldn't we love to own real blue diamond earrings just like them? Of course we would!:)💙🔵 
I had no idea there were blue diamonds Debbie. So interesting, and so rare. They would indeed make fabulous earrings. In Australia we have pink diamonds, which are also quite expensive and aspirational. They are exported around the world. Happy Springtime!
ReplyDeleteTrish, isn't it cool to learn new things? I love it when I do. I have heard of the Australian pink diamond mine at Argyle. After 37 years of operation, it closed in November 2020. I 'm hopeful the emergence of lab grown diamonds and other precious gemstones will make them affordable to average folks like you and me.:)
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