Not a diamond; appears to be colored glass or slag glass, or potentially an artificially colored quartz/mineral specimen.
Not a diamond; appears to be colored glass or slag glass, or potentially an artificially colored quartz/mineral specimen. · Rough / Raw Uncut Specimen
N/A (Rough, unpolished natural/artificial fracture surfaces) Cut
Carat
Cannot be accurately determined as a diamond; heavy specimen estimated above 10+ carats in equivalent mass.
Color
Fancy Vivid Blue (Artificial/Treated coloration)
Clarity
Included (Contains numerous bubbles and internal flow lines typical of manufactured glass)
Shape
Rough / Raw Uncut Specimen
Overall Assessment
The specimen shown in the image lacks the characteristic crystal habit, hardness, luster, and optical properties of a diamond. It is definitively identified as colored glass or mineral slag displaying typical conchoidal fractures and internal gas bubbles.
Cut Quality
N/A (Rough, unpolished natural/artificial fracture surfaces)
Brilliance
Low to moderate, lacks the high refractive index and dispersion of a genuine diamond
Fire
Very low, lacks the spectral dispersion characteristic of diamond
Scintillation
Poor, due to lack of facets and optical properties of diamond
Proportions
N/A for rough irregular specimen
Symmetry
Asymmetrical rough form
Polish
Unpolished, rough conchoidal fracture
Fluorescence
Unknown without UV testing, though typical blue slag glass may show inert or moderate chalky fluorescence.
Inclusions
Gas bubbles, flow lines, and swirl marks indicative of glass
Blemishes
Surface scratches, pitting, and conchoidal fracture ripples
Origin
Laboratory-made or industrial glass / slag
Treatment Detection
Coloration is likely introduced via metallic impurities or surface coating typical of decorative glass.
Estimated Value
Nominal / Decorative value only (less than $10 USD as a mineral specimen/glass piece)
Certification Estimate
Standard gemological laboratories (GIA, AGS, IGI) would issue a report identifying this as manufactured glass or mineral simulants rather than diamond.
Investment Potential
None; holds no monetary or investment value as a gemstone.
Similar Diamonds
None, as this material has no gemological or structural relation to diamond.
Setting Suggestions
Wire-wrapping or bezel setting suitable for raw mineral or glass specimens if used for crafting.
Care & Maintenance
Avoid harsh chemicals and extreme temperature shocks; store separately to prevent scratching softer materials.
Interesting Facts
Many blue slag glass specimens are mistaken for raw aquamarine, tourmaline, or colored diamonds by untrained observers due to their vibrant hue.