Not a diamond (appears to be industrial glass or obsidian slag)
Not a diamond (appears to be industrial glass or obsidian slag) · Raw, uncut, unshaped amorphous block
Not applicable (uncut raw material with conchoidal fracture) Cut
Carat
Not applicable (rough industrial material)
Color
Dark/opaque black with amber undertones
Clarity
Not applicable
Shape
Raw, uncut, unshaped amorphous block
Overall Assessment
The specimen pictured is definitively not a diamond. Based on the conchoidal fractures, luster, and internal bubble-like characteristics, it is likely a piece of industrial glass, slag, or obsidian.
Cut Quality
Not applicable (uncut raw material with conchoidal fracture)
Brilliance
Poor to non-existent due to opaque/dark nature
Fire
None
Scintillation
None
Proportions
Not applicable
Symmetry
Not applicable (asymmetrical raw material)
Polish
Unpolished natural/fractured surface
Fluorescence
Not applicable
Inclusions
Gas bubbles and internal flow lines typical of glass
Blemishes
Conchoidal fracture marks and surface chips
Origin
Synthetic industrial byproduct or volcanic glass
Treatment Detection
Not applicable
Estimated Value
Minimal to negligible (decorative or educational specimen value only)
Certification Estimate
Cannot be certified by gemological diamond labs (GIA, IGI, etc.)
Investment Potential
None
Similar Diamonds
None (this is not a diamond)
Setting Suggestions
Not suitable for fine jewelry setting
Care & Maintenance
Standard cleaning with warm soapy water if kept as a mineral specimen
Interesting Facts
The conchoidal fracture visible in the image is a classic diagnostic feature of glass and obsidian, easily distinguishing it from crystalline diamond.