Not a diamond (appears to be a rough mineral specimen, potentially obsidian, black tourmaline, or carbonado diamond, but visual characteristics strongly suggest non-gem quality industrial or carbonaceous material)
Not a diamond (appears to be a rough mineral specimen, potentially obsidian, black tourmaline, or carbonado diamond, but visual characteristics strongly suggest non-gem quality industrial or carbonaceous material) · Rough/Uncut crystal matrix
Uncut / Rough Cut
Carat
N/A (Rough mineral specimen, estimated over 50 carats by weight)
Color
Fancy Dark Black
Clarity
Opaque / I3 equivalent
Shape
Rough/Uncut crystal matrix
Overall Assessment
The specimen displayed is a dark, vitreous rough mineral rather than a polished gemstone-quality diamond. Professional gemological testing (Raman spectroscopy or specific gravity test) is recommended for definitive mineral identification.
Cut Quality
Uncut / Rough
Brilliance
Low due to opaque nature and lack of faceting
Fire
None
Scintillation
Minimal, limited to light reflection off vitreous fracture planes
Proportions
Non-standard rough geometry
Symmetry
Asymmetrical rough formation
Polish
Natural unpolished surface with vitreous luster on fracture planes
Fluorescence
None observed
Inclusions
Dense internal clouding, mineral inclusions, fractures
Blemishes
Natural surface pitting, rough patches, matrix attachment
Origin
Natural geological formation
Treatment Detection
No treatments detected; natural state
Estimated Value
Nominal mineral specimen value ($10 - $50 depending on exact mineral ID)
Certification Estimate
Standard geological testing rather than gemological lab grading (e.g., GIA would classify as industrial or non-gem rough)
Investment Potential
Collector/specimen value only, not suitable for gemstone investment
Similar Diamonds
Carbonado (black diamond) rough or industrial-grade bort
Setting Suggestions
Wire-wrapped rough mineral setting or custom bezel for specimen display
Care & Maintenance
Store carefully to prevent chipping of rough edges; clean gently with mild soap and water
Interesting Facts
Black rough minerals are often mistaken for industrial diamonds due to their dark coloration and vitreous luster