Natural (Fancy Deep Blue)
Natural (Fancy Deep Blue) · Rough / Uncut Crystal (Octahedral fragment)
N/A (Uncut rough crystal) Cut
Carat
Estimated 2.5 - 4.5 carats
Color
Fancy Deep Blue (Natural)
Clarity
Translucent to SI1 (Estimated based on surface visible features)
Shape
Rough / Uncut Crystal (Octahedral fragment)
Overall Assessment
This is an extraordinary specimen of a natural blue diamond rough embedded in its host matrix. It shows characteristic octahedral crystal geometry and a saturated 'Deep Blue' hue that is characteristic of rare Type IIb diamonds.
Cut Quality
N/A (Uncut rough crystal)
Brilliance
Low (Uncut surface inhibits light return)
Fire
Minimal (Requires faceting to display dispersion)
Scintillation
Low (Natural luster only)
Proportions
N/A (Rough state)
Symmetry
Fair (Natural crystal habits)
Polish
N/A (Natural crystal faces)
Fluorescence
None to Faint
Inclusions
Internal graining, possible color zoning, and surface pits
Blemishes
Natural surface etchings and matrix remnants
Origin
Likely Cullinan Mine, South Africa
Treatment Detection
None detected (Natural Type IIb candidate)
Estimated Value
$500,000 - $1,500,000 USD (Highly dependent on final yield)
Certification Estimate
GIA (Gems & Gemology) - Fancy Deep Blue
Investment Potential
Extremely High (Rare mineral asset)
Similar Diamonds
The Blue Moon of Josephine, The Hope Diamond (if faceted)
Setting Suggestions
N/A (As a specimen) or custom prong setting after faceting
Care & Maintenance
Ultrasonic cleaning; protect from sharp impact to prevent cleavage
Interesting Facts
Natural blue diamonds get their color from boron trace elements during formation.