Posted on May 11, 2016 by

6 Facts About Natural Blue Diamonds You Should Know


There’s no question that natural blue diamonds are exceedingly rare and encountered very infrequently in nature and on the diamond market. It’s not surprising, then, that blue diamonds command very high prices when they are discovered and made available for sale. Consider the improbable odds of stumbling on a natural blue diamond when just one in 10,000 diamonds will be a fancy colored diamond – and it is well-known that brown diamonds and yellow diamonds are the most common types of fancy colored diamonds. The existence of fancy blue diamonds is made all the more remarkable when we consider those unlikely statistics. In today’s blog we pay homage to natural blue diamonds – here are 6 facts about natural blue diamonds you should know.


  1. Natural blue diamonds get their color from the presence of boron – less than one boron atom for every million carbon atoms can produce the distinctive and highly valued color of blue diamonds. The greater the amount of boron, the bluer the diamond. However, pure blue diamonds are incredibly rare – the majority of natural blue diamonds contains a secondary color, particularly grey or green.


Set of four individual natural Fancy Intense Blue diamonds of varying color tones

These are all natural Fancy Intense Blue diamonds – while they all have the same color intensity (saturation), as you can see, there are slight variations in color tone, i.e., lightness or darkness of color.


  1. Like other natural fancy colored diamonds, color is first and foremost the top priority when it comes to natural blue diamonds. Clarity therefore understandably takes a backseat to color – a blue diamond with a lower clarity than is typically desired will nonetheless be exceptionally rare, valuable and coveted.


  1. Rough blue diamonds tend to be particularly challenging to cut due to their asymmetrical shape. Natural blue diamonds in their untouched state are prone to color zoning as well, exhibiting an uneven concentration and distribution of body color. Color zoning in blue diamonds only adds to the difficulties a cutter faces when tasked with the tricky assignment of cutting a rough blue diamond as the ultimate goal in diamond cutting is to achieve the finest color possible in a given diamond without sacrificing carat weight unnecessarily.


  1. While India was once the major source of natural blue diamonds, the primary, yet nonetheless tiny, supply now originates from the Cullinan Mine in South Africa. A much lesser supply comes from other South African mines, Sierra Leone, Borneo (an island in Southeast Asia) and Brazil.


  1. The world’s most famous gem is the Hope Diamond, a 45.52 carat Fancy Deep Grayish Blue diamond. Purchased by Henry Philip Hope in 1830, the Hope Diamond is well-known for carrying a curse that has tormented its previous owners.


12.03 ct. Internally Flawless (IF) Cushion Cut Fancy Vivid Blue Diamond aka "Blue Moon Diamond"

The 12.03 ct. Internally Flawless Cushion Cut Fancy Vivid Blue diamond, better known as the ‘Blue Moon diamond,’ sold for a record-setting $48.5 million at a Sotheby’s auction in November 2015. Photo:


  1. The world’s most expensive diamond – and the most expensive jewel sold at auction – is the 12.03 carat “Blue Moon” diamond, one of the largest Fancy Vivid Blue diamonds known to exist. Sotheby’s Geneva sold the significant diamond for a record-breaking $48.5 million to Hong Kong’s sixth richest man, property tycoon Joseph Lau.


Looking to invest in your own natural blue diamond? You’ve come to the right source!

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>