Probable Non-Diamond (likely Industrial Glass, Slag, or Synthetic Quartz)
Probable Non-Diamond (likely Industrial Glass, Slag, or Synthetic Quartz) · Rough / Uncut / Amorphous fragment
N/A (Uncut rough fragment) Cut
Carat
Estimated 20-40 carats based on finger scale
Color
Colorless with intense iridescent surface sheen
Clarity
Translucent to Transparent (non-gem equivalent)
Shape
Rough / Uncut / Amorphous fragment
Overall Assessment
The specimen lacks the octahedral or dodecahedral crystal habit of a natural diamond. The conchoidal (shell-like) fractures and the specific type of light interference suggest a non-diamond material, likely industrial glass or a very low-quality synthetic simulant.
Cut Quality
N/A (Uncut rough fragment)
Brilliance
Very Low (Surface reflection only)
Fire
High surface iridescence (Thin-film interference), different from diamond dispersion
Scintillation
None
Proportions
N/A (Irregular fragment)
Symmetry
Poor / Asymmetrical
Polish
None (Natural or fractured surface)
Fluorescence
Indeterminate; iridescent surface effect is not UV fluorescence
Inclusions
Conchoidal fracture lines, internal striations, and bubbles suggestive of glass
Blemishes
Severe surface chipping and impact marks
Origin
Man-made industrial byproduct
Treatment Detection
N/A (Likely not a gemstone to begin with)
Estimated Value
$5 - $20 USD (Decorative or mineral specimen value)
Certification Estimate
Unlikely to be accepted by GIA or IGI as a diamond
Investment Potential
None
Similar Diamonds
None (Does not resemble natural or lab-grown diamond rough)
Setting Suggestions
Wire wrapping or display case as a mineral specimen
Care & Maintenance
Avoid high heat or drops as the material appears brittle and glass-like
Interesting Facts
The rainbow effect seen is likely thin-film interference on a fracture plane, common in industrial glass and certain quartz varieties.