Natural Rough Diamond
Natural Rough Diamond · Dodecahedron (Natural Crystal)
Uncut / Rough Cut
Carat
1.5 - 2.5 carats
Color
Fancy Dark Brownish Grey with Greenish skin
Clarity
I3 (Opaque/Industrial)
Shape
Dodecahedron (Natural Crystal)
Overall Assessment
This is a natural rough diamond crystal showing classic dodecahedral geometry. Its most significant feature is the well-defined triangular trigon on the surface, which proves its natural origin. While it lacks the clarity for high-end faceting, it is an excellent geological specimen.
Cut Quality
Uncut / Rough
Brilliance
N/A (Opaque)
Fire
None
Scintillation
Low (metallic sheen from trigons)
Proportions
Not applicable for rough stones
Symmetry
Good for a natural crystal
Polish
Natural crystal faces (unpolished)
Fluorescence
None
Inclusions
Heavy internal clouds, dark minerals, and growth twinning
Blemishes
Trigons (triangular growth pits), surface skin, and percussion marks
Origin
Likely West Africa or Botswana
Treatment Detection
None (Natural unenhanced)
Estimated Value
$150 - $400 USD (collectible/specimen value)
Certification Estimate
GIA Rough Diamond Report
Investment Potential
Low (primarily educational or for niche specimen collectors)
Similar Diamonds
Ethically sourced rough specimens or 'Boart' grade industrial diamonds
Setting Suggestions
Rough diamond specimen setting or custom organic 'Salt and Pepper' jewelry
Care & Maintenance
Ultrasonic cleaners should be avoided due to potential hidden fractures; clean with warm soapy water and a soft brush.
Interesting Facts
The prominent triangular feature is a 'trigon,' a natural growth characteristic unique to diamonds that forms as the crystal grows under high pressure and temperature deeply within the Earth's mantle.