Natural (Fancy Deep Blue)
Natural (Fancy Deep Blue) · Rough / Uncut Crystal
N/A (Rough) Cut
Carat
5 - 12 carats (estimated visually)
Color
Fancy Deep Blue
Clarity
I (Included) - due to visible surface-reaching fractures and matrix
Shape
Rough / Uncut Crystal
Overall Assessment
This appears to be a high-value natural blue diamond rough embedded in host matrix. If authentic, it represents a world-class mineral specimen.
Cut Quality
N/A (Rough)
Brilliance
Low (due to rough surface state and lack of facets)
Fire
Minimal (spectral dispersion hidden by rough exterior)
Scintillation
Static (scattered surface reflection only)
Proportions
N/A (Uneven natural geometric habit)
Symmetry
N/A (Rough crystal form)
Polish
N/A (Rough natural surface)
Fluorescence
Indeterminable without UV light, likely None to Faint
Inclusions
Internal graining, cleavage planes, and mineral inclusions visible
Blemishes
Nick, pits, and structural fractures on the surface matrix
Origin
Cullinan Mine, South Africa (Historically significant source for Type IIb blues)
Treatment Detection
None visible; likely natural color from Boron trace elements
Estimated Value
$500,000 - $2,000,000+ (Extremely rare if confirmed as true blue diamond rough)
Certification Estimate
GIA (Colored Diamond Grading Report)
Investment Potential
Extremely High (Blue diamonds are among the rarest tangible assets)
Similar Diamonds
Okavango Blue (in rough state), Hope Diamond (historical reference)
Setting Suggestions
Collector's specimen display or custom tension setting for the rough form
Care & Maintenance
Avoid ultrasonic cleaners; handle with care to prevent cleavage along fracture lines
Interesting Facts
Natural blue diamonds are Type IIb, containing boron atoms that conduct electricity.