Not a diamond; appears to be industrial slag or a dark vitreous/obsidian-like mineral specimen with conchoidal fracture and surface bubbles.
Not a diamond; appears to be industrial slag or a dark vitreous/obsidian-like mineral specimen with conchoidal fracture and surface bubbles. · Uncut or raw amorphous chunk
Not applicable Cut
Carat
Not applicable
Color
Dark brown to black opaque
Clarity
Not applicable
Shape
Uncut or raw amorphous chunk
Overall Assessment
This specimen is a dark, glassy material (likely slag or industrial glass) rather than a diamond or precious gemstone.
Cut Quality
Not applicable
Brilliance
Poor / Non-existent
Fire
None
Scintillation
None
Proportions
Not applicable
Symmetry
Asymmetrical
Polish
Natural rough to vitreous luster
Fluorescence
Not applicable
Inclusions
Numerous internal gas bubbles and mineral fragments typical of slag
Blemishes
Surface pits and conchoidal fracture marks
Origin
Industrial byproduct or terrestrial volcanic glass
Treatment Detection
None applicable
Estimated Value
Minimal collector or scrap value (nominal)
Certification Estimate
Not certifiable as a gemstone by major gemological labs (GIA, IGI)
Investment Potential
None
Similar Diamonds
None
Setting Suggestions
Not suitable for jewelry setting
Care & Maintenance
Standard handling for mineral specimens
Interesting Facts
The conchoidal fracture pattern and internal bubbles clearly distinguish this from any crystalline gemstone.