Industrial glass or slag (not a diamond)
Industrial glass or slag (not a diamond) · Rough/Amorphous fragment
Uncut/Broken fragment Cut
Carat
N/A (Non-gemstone material)
Color
Colorless with oily/iridescent surface sheen
Clarity
Translucent with heavy internal striations and bubbles
Shape
Rough/Amorphous fragment
Overall Assessment
This is a piece of industrial glass or cullet. It lacks the refractive index, crystal structure, and hardness of a diamond, showing clear conchoidal fractures and flow lines typical of amorphous solids.
Cut Quality
Uncut/Broken fragment
Brilliance
Low/Dull
Fire
Minimal (surface iridescence from oil or thin-film interference)
Scintillation
None
Proportions
Asymmetrical jagged fragment
Symmetry
None
Polish
Uneven, shell-like (conchoidal) fracture surfaces
Fluorescence
None
Inclusions
Visible flow lines, bubbles, and internal stress fractures
Blemishes
Chipped edges and surface pitting
Origin
Man-made glass or industrial byproduct
Treatment Detection
Natural state of glass waste
Estimated Value
Zero market value as a gemstone
Certification Estimate
Not certifiable by GIA/AGS as a diamond
Investment Potential
None
Similar Diamonds
Cullet glass or common slag
Setting Suggestions
Not suitable for jewelry setting
Care & Maintenance
Handle with care to avoid cuts from sharp glass edges
Interesting Facts
The shell-like fracture pattern seen here is characteristic of glass, not the octahedral or dodecahedral growth patterns of diamonds.