Not a diamond; appears to be a dark mineral specimen such as tourmaline, obsidian, or dark quartz/slag
Not a diamond; appears to be a dark mineral specimen such as tourmaline, obsidian, or dark quartz/slag · Rough crystal fragment / irregular uncut chunk
Not applicable (uncut raw crystal) Cut
Carat
Not applicable for rough non-diamond minerals
Color
Dark brown to black
Clarity
Opaque / Heavily included
Shape
Rough crystal fragment / irregular uncut chunk
Overall Assessment
The specimen shown in the image is a dark, rough mineral fragment rather than a diamond, displaying characteristic conchoidal fracture patterns.
Cut Quality
Not applicable (uncut raw crystal)
Brilliance
Low to none due to opacity and dark coloration
Fire
None
Scintillation
None
Proportions
Not applicable
Symmetry
Natural crystal symmetry / irregular fracture
Polish
Raw natural surface with conchoidal fractures
Fluorescence
Not evaluated
Inclusions
Numerous internal fractures and mineral impurities
Blemishes
Natural surface pitting, chipping, and irregularities
Origin
Natural geological formation
Treatment Detection
No treatments detected
Estimated Value
Nominal mineral specimen value
Certification Estimate
Gemological testing laboratory (e.g., GIA) for mineral identification
Investment Potential
Low; decorative mineral specimen value only
Similar Diamonds
None (not a diamond)
Setting Suggestions
Wire-wrapped or raw mineral specimen mounting
Care & Maintenance
Standard mineral care; avoid harsh chemicals and impact
Interesting Facts
Raw mineral specimens showcase natural geological processes