Natural (Fancy Color Blue)
Natural (Fancy Color Blue) · Rough / Uncut Crystal (Modified Octahedral)
N/A (Rough Crystal) Cut
Carat
Estimated 2.5 - 4.5 carats
Color
Fancy Deep Blue / Fancy Vivid Blue
Clarity
SI1 - I1 (estimated due to matrix and rough surface)
Shape
Rough / Uncut Crystal (Modified Octahedral)
Overall Assessment
This appears to be an extraordinary, rare natural blue diamond crystal embedded in its original kimberlite/iron-rich matrix. The saturation is exceptionally high, making it a world-class specimen.
Cut Quality
N/A (Rough Crystal)
Brilliance
Low (due to uncut state)
Fire
Low (due to uncut state)
Scintillation
Minimal (specular reflections from crystal faces)
Proportions
Natural crystal growth; no facet proportions available
Symmetry
Fair (Natural crystal formation)
Polish
N/A (Rough state)
Fluorescence
None to Faint (Typical for natural blue diamonds)
Inclusions
Internal clouds, crystals, and potential graining visible near the matrix
Blemishes
Natural surface pits, growth lines, and adhering matrix rock
Origin
South Africa (Cullinan Mine) or India (Golkonda)
Treatment Detection
None visible; type IIb indicated by color
Estimated Value
$500,000 - $1,500,000+ USD depending on yield after cutting
Certification Estimate
GIA (Gemological Institute of America) - Likely Fancy Deep Blue
Investment Potential
Extremely High; among the rarest commodities on Earth
Similar Diamonds
The Hope Diamond, Blue Moon of Josephine
Setting Suggestions
Collection specimen in matrix, or custom high-jewelry setting after professional cutting
Care & Maintenance
Keep in a temperature-controlled environment; avoid ultrasonic cleaners while in matrix
Interesting Facts
Natural blue diamonds get their color from boron atoms replacing carbon in the crystal structure