Rough diamond crystal (uncut, unpolished natural mineral specimen)
Rough diamond crystal (uncut, unpolished natural mineral specimen) · Uncut natural crystal form (distorted octahedron / irregular rough shape)
Not applicable (Rough, un-faceted specimen) Cut
Carat
Estimated 1.5 to 2.5 carats based on visual proportions and matrix
Color
Fancy Dark Gray to Black (Industrial / Boart quality)
Clarity
I3 / Included (High density of internal inclusions, cloudy, heavily included)
Shape
Uncut natural crystal form (distorted octahedron / irregular rough shape)
Overall Assessment
This is an authentic, natural rough diamond specimen of industrial or near-gem quality. It lacks the clarity and cut required for traditional jewelry use, but serves as a fascinating geological piece showcasing natural crystal formation before human intervention.
Cut Quality
Not applicable (Rough, un-faceted specimen)
Brilliance
Poor to none due to lack of facets and opaque dark body color
Fire
None due to opacity and lack of facet dispersion
Scintillation
None due to opaque nature and un-faceted surface
Proportions
Natural rough morphology, no standard pavilion/crown depth ratios apply
Symmetry
Natural asymmetric crystal growth
Polish
Raw, unpolished natural crystal surfaces showing trigons and striations
Fluorescence
Cannot be determined without UV light testing (typically inert to faint in dark stones)
Inclusions
Abundant mineral inclusions, carbon spots, feathers, and cloudiness throughout
Blemishes
Natural surface pitting, rough skin, and possible abrasions from alluvial transport
Origin
Likely alluvial or primary kimberlite deposit (African or Brazilian origin common for specimens of this appearance)
Treatment Detection
No treatments detected; completely untreated natural rough stone
Estimated Value
Nominal value as a mineral specimen ($50 - $150 USD depending on exact weight and origin)
Certification Estimate
Not typically certified by major labs like GIA unless for specific research; raw weight certificate possible
Investment Potential
Low investment value; valued primarily as a geological specimen or educational piece rather than a gemstone investment
Similar Diamonds
Other industrial-grade or specimen-grade rough carbonado and boart diamonds
Setting Suggestions
Wire-wrapped pendant, raw organic prong setting, or kept as a raw mineral display specimen in a custom mount
Care & Maintenance
Store safely in a padded gem box; avoid harsh chemicals or ultrasonic cleaners which might damage surface features
Interesting Facts
Rough diamonds like this often possess high hardness (Mohs 10) despite their unpolished and dark appearance, making them useful for industrial abrasive applications