Rough Natural Diamond (Unprocessed / Industrial or Bort Grade)
Rough Natural Diamond (Unprocessed / Industrial or Bort Grade) · Uncut / Natural Crystal Form (Irregular / Resinous or Polished Pebble-like Fragment)
Not Applicable (Rough un-faceted stone) Cut
Carat
Estimated 3.50 to 5.00 carats visually, pending accurate scale measurement
Color
Fancy Dark Brown to Black (opaque carbonado or heavily included industrial diamond)
Clarity
I3 (Heavy inclusions, opaque, highly flawed internally with structural weakness)
Shape
Uncut / Natural Crystal Form (Irregular / Resinous or Polished Pebble-like Fragment)
Overall Assessment
This specimen is a raw, unrefined rough diamond or carbonado-type stone of industrial grade. While lacking the transparency and scintillation of a gem-quality diamond, it represents a fascinating natural geological specimen with characteristic rough surface textures.
Cut Quality
Not Applicable (Rough un-faceted stone)
Brilliance
Minimal to none due to opacity, dark color, and lack of facets
Fire
Absent due to opaque nature and lack of crown/pavilion facets
Scintillation
Negligible, restricted to faint light reflections off the curved, uneven surface
Proportions
Non-standard, irregular rough nugget proportions with no traditional table or pavilion angles
Symmetry
Natural asymmetric rough crystal form
Polish
Raw natural surface with some partial worn/resinous luster, unpolished
Fluorescence
Cannot determine accurately without UV testing, likely Inert
Inclusions
Extensive internal clouds, feathers, mineral crystals, and dark carbon spots throughout
Blemishes
Natural surface pitting, rough skin, trigons, and minor abrasion marks from handling
Origin
Likely alluvial African or South American origin, or synthetic industrial source (requires testing)
Treatment Detection
No obvious signs of artificial treatments; appears completely natural and untreated
Estimated Value
Low commercial value ($50 - $200 USD), valued primarily as a specimen or industrial abrasive
Certification Estimate
Industrial assessment or basic GIA/EGL report as rough natural diamond, grade Industrial/Bort
Investment Potential
Very low investment potential; suitable primarily as a mineral specimen or curiosity
Similar Diamonds
Other industrial grade boart, carbonado, and unworked alluvial rough diamond crystals
Setting Suggestions
Wire-wrapped pendant, organic rustic bezel setting in yellow or oxidized sterling silver
Care & Maintenance
Store separately to avoid scratching other stones; clean gently with warm soapy water and soft brush
Interesting Facts
Rough diamonds of this dark, opaque variety are frequently used in industrial drilling, cutting tools, and abrasives