Most affordable black diamonds on the market are actually low-quality colorless diamonds that have been subjected to high heat (annealing) or irradiation to turn them black. 📈 Market Value & Grading

Black diamonds are evaluated differently than the standard "4Cs" used for colorless stones. Standard Diamond Black Diamond Graded D to Z (colorless is best) Assigned a single grade: "Fancy Black" Clarity Valued for lack of inclusions Valued for high density of inclusions Sparkle Maximized through light reflection Replaced by a mirror-like surface luster Price Typically $5,000+ per carat (high grade) Natural: $3,000–$5,000 ; Treated: $100–$200 per carat

These are polycrystalline, meaning they are composed of millions of tiny crystals fused together rather than one single crystal. They are found almost exclusively in Brazil and the Central African Republic.

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Darker Diamonds Apr 2026

Most affordable black diamonds on the market are actually low-quality colorless diamonds that have been subjected to high heat (annealing) or irradiation to turn them black. 📈 Market Value & Grading

Black diamonds are evaluated differently than the standard "4Cs" used for colorless stones. Standard Diamond Black Diamond Graded D to Z (colorless is best) Assigned a single grade: "Fancy Black" Clarity Valued for lack of inclusions Valued for high density of inclusions Sparkle Maximized through light reflection Replaced by a mirror-like surface luster Price Typically $5,000+ per carat (high grade) Natural: $3,000–$5,000 ; Treated: $100–$200 per carat Darker Diamonds

These are polycrystalline, meaning they are composed of millions of tiny crystals fused together rather than one single crystal. They are found almost exclusively in Brazil and the Central African Republic. Most affordable black diamonds on the market are