Non-diamond (Glass/Slag)
Non-diamond (Glass/Slag) · Rough/Amorphous
Uncut/Raw Cut
Carat
Estimated 10-20 carats based on visual scale
Color
Colorless to Near-Colorless with local contamination
Clarity
I3 (Included) / Opaque inclusions
Shape
Rough/Amorphous
Overall Assessment
This specimen is identified as glass/slag and lacks the refractive index, hardness, and crystal structure of a diamond.
Cut Quality
Uncut/Raw
Brilliance
Low (Refractive index inconsistent with diamond)
Fire
Weak (Visible spectral dispersion from edges only)
Scintillation
Minimal/None
Proportions
Irregular
Symmetry
N/A
Polish
Poor (Natural texture)
Fluorescence
None visible
Inclusions
Conchoidal fractures, internal swirl marks, bubbles
Blemishes
Surface pitting, heavy abrasions, jagged edges
Origin
Likely post-industrial slag or cullet glass
Treatment Detection
None detected; material is synthetic glass
Estimated Value
Low (Decorative/Specimen value only)
Certification Estimate
Not certifiable as a diamond; GIA/IGI would likely identify as Manufactured Glass
Investment Potential
Zero (Industrial byproduct)
Similar Diamonds
Kortlandt glass or desert glass
Setting Suggestions
Not suitable for traditional jewelry setting; wire wrapping for specimens
Care & Maintenance
Avoid impact; glass is more brittle than diamond and prone to chipping
Interesting Facts
The presence of conchoidal (shell-like) fractures and air bubbles is a primary indicator of glass and excludes high-pressure minerals like diamond.