Not a diamond (Green glass or slag material)
Not a diamond (Green glass or slag material) · Rough elongated bar or slab
Uncut / Raw material Cut
Carat
Estimated equivalent to roughly 15-20 carats based on volume
Color
Vivid Green (Fancy Intense/Vivid equivalent)
Clarity
Included (contains numerous gas bubbles and flow lines typical of glass)
Shape
Rough elongated bar or slab
Overall Assessment
This specimen is a green glass fragment or slag rather than a genuine diamond or gemstone. Its internal features, notably the swirl marks and rounded gas bubbles visible in the structure, definitively confirm a non-crystalline, vitreous origin.
Cut Quality
Uncut / Raw material
Brilliance
Vitreous luster, low white light return compared to diamond
Fire
Very low dispersion compared to diamond
Scintillation
Minimal, standard for vitreous materials
Proportions
Elongated prismatic bar shape
Symmetry
Irregular / Asymmetric
Polish
Crude or natural fracture surfaces with glassy luster
Fluorescence
Likely inert or moderate green under UV depending on glass composition
Inclusions
Spherical gas bubbles and swirl marks
Blemishes
Surface striae, chips, and flow lines
Origin
Man-made industrial or decorative glass
Treatment Detection
None needed, material is synthetic glass
Estimated Value
Nominal value as a decorative or collectible glass specimen (under $10)
Certification Estimate
Not applicable for grading labs, would be identified as man-made glass by GIA/AGS/IGI
Investment Potential
None
Similar Diamonds
None, as this is visually and compositionally distinct from diamond
Setting Suggestions
Wire-wrapping or bezel setting if used for costume jewelry
Care & Maintenance
Avoid harsh impacts as glass is prone to chipping and scratching (Mohs hardness ~5.5)
Interesting Facts
Green glass is frequently mistaken for rough emerald, tourmaline, or green diamond by untrained observers due to its vibrant color and vitreous appearance.