Stone Guide
Red Diamond
Origin: Argyle, Brazil, Africa
What Makes It Special
This is the absolute pinnacle of rarity in the diamond world. We are talking about fewer than 30 known natural red diamonds of any significant size in existence. The fact that the industry still has no universally agreed scientific explanation for the color—it is likely a plastic deformation of the crystal lattice rather than a trace element—just adds to the mystique. When you encounter a true Fancy Red, you are looking at a geological impossibility.
Required Documentation
A GIA colored diamond report is absolutely essential to confirm natural color origin. There is zero flexibility here.
Price Guide 2026
⚠️ Treated red diamonds are worth a tiny fraction of natural pieces. Value relies 100% on the natural origin being certified.
Notable Auction Records
The Moussaieff Red (5.11ct Fancy Red IF)
Private Sale (2001)
Undisclosed
Estimated $1,500,000+/ct
Dealer's Notes
Don't hold out for a 1-carat stone. Any red diamond over 1ct is extraordinary, but anything over 0.20ct is a major find.
Always insist on a GIA report explicitly stating 'Fancy Red' without modifying colors like 'Purplish' or 'Brownish' if you want top tier.
Beware of stones pushing the boundary of Pink and Red; the GIA grade makes a massive difference in valuation.
If you are offered a 'deal' on a red diamond, walk away. They are priced as unicorns.
Understand that these almost never come to the open market. When they do, they set auction records.
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