Likely Non-Diamond (Glass or Slag)
Likely Non-Diamond (Glass or Slag) · Rough / Irregular Fragment
Uncut / Raw Fragment Cut
Carat
Estimated 30-50 carats (based on finger scale)
Color
Colorless / Transparent
Clarity
Internal Fractures and Flow Lines
Shape
Rough / Irregular Fragment
Overall Assessment
Based on the visual evidence of conchoidal fracturing, lack of crystal habit, and low refractive index, this specimen is highly likely a fragment of glass/slag rather than a gemstone.
Cut Quality
Uncut / Raw Fragment
Brilliance
Low (typical of glass, lacking diamond facet refraction)
Fire
Very Low (minimal dispersion observed)
Scintillation
Poor (typical of unpolished silica)
Proportions
Not applicable
Symmetry
None (irregular shape)
Polish
Natural glassy luster
Fluorescence
None visible under natural light
Inclusions
Conchoidal fracture patterns and possible air bubbles
Blemishes
Jagged, sharp edges and surface scratching
Origin
Industrial or discarded glass waste
Treatment Detection
Not applicable; material appears to be man-made glass
Estimated Value
$0 - $5 (decorative value only)
Certification Estimate
Unlikely to be graded as a diamond by GIA/IGI
Investment Potential
None
Similar Diamonds
None; does not share optical properties with diamond
Setting Suggestions
Not recommended for fine jewelry; possible wire-wrap for craft
Care & Maintenance
Avoid contact with skin if edges are sharp; glass will scratch easily
Interesting Facts
The curved, shell-like (conchoidal) fractures shown are characteristic of glass, not diamond habit