Not a diamond; this is colored glass (slag glass or cullet)
Not a diamond; this is colored glass (slag glass or cullet) · Rough irregular fragment / amorphous mass
Uncut / Raw (conchoidal fracture typical of glass) Cut
Carat
Estimated equivalent weight is substantial (approx. 20-30+ carats of volume, but no gemstone value)
Color
Vivid green (fancy strong green equivalent if it were a gem)
Clarity
Not applicable to glass; contains prominent bubbles and flow lines
Shape
Rough irregular fragment / amorphous mass
Overall Assessment
The specimen is clearly not a diamond; visual indicators such as conchoidal fracture lines and internal gas bubbles confirm it is simply a piece of green glass.
Cut Quality
Uncut / Raw (conchoidal fracture typical of glass)
Brilliance
Vitreous luster, low optical brilliance compared to diamond
Fire
Very low dispersion / fire
Scintillation
Minimal, non-faceted material
Proportions
Irregular raw specimen with no standard facet proportions
Symmetry
Asymmetrical raw fragment
Polish
Unpolished natural fractured surface
Fluorescence
Unknown without UV testing
Inclusions
Gas bubbles and swirl marks clearly visible internally
Blemishes
Surface chips, conchoidal fracture ripples, and abrasion marks
Origin
Man-made industrial glass or slag
Treatment Detection
Artificial coloration typical of decorative or slag glass
Estimated Value
Nominal / Decorative only (less than $5 USD as a mineral specimen/glass piece)
Certification Estimate
Not eligible for diamond certification by GIA, AGS, or IGI
Investment Potential
None
Similar Diamonds
None, as this is glass rather than crystalline carbon
Setting Suggestions
Wire-wrapping if used for artisan jewelry
Care & Maintenance
Standard gentle cleaning with mild soap and water; store separately to avoid scratching softer materials
Interesting Facts
Green glass is frequently mistaken by novices for rough emerald or colored diamond due to its vivid hue and conchoidal fracture patterns