Not a diamond; this specimen appears to be blue glass or synthetic slag, displaying conchoidal fracture patterns and vitreous luster typical of amorphous materials rather than crystalline diamond.
Not a diamond; this specimen appears to be blue glass or synthetic slag, displaying conchoidal fracture patterns and vitreous luster typical of amorphous materials rather than crystalline diamond. · Rough uncut piece with conchoidal fracture surfaces
Not applicable (uncut/raw appearance with fracture faces) Cut
Carat
Not applicable as this is not a gemstone diamond, but the specimen weight is visually estimated around 15-20 carats equivalent volume.
Color
Vivid Blue (synthetic coloration)
Clarity
Not applicable for glass; contains internal bubbles and flow lines typical of manufactured material.
Shape
Rough uncut piece with conchoidal fracture surfaces
Overall Assessment
This specimen is definitively not a diamond. It lacks the crystal structure, hardness, and optical properties of diamond, instead displaying characteristics consistent with man-made blue glass.
Cut Quality
Not applicable (uncut/raw appearance with fracture faces)
Brilliance
Vitreous glass luster rather than diamond adamantine luster
Fire
Very low dispersion compared to diamond or moissanite
Scintillation
Limited flash effect due to lack of facet geometry
Proportions
Not applicable to raw amorphous materials
Symmetry
Asymmetrical raw amorphous chunk
Polish
Unpolished natural or fractured surfaces showing glassy luster
Fluorescence
Unknown without UV testing, though typical blue glasses may show inert or moderate chalky reactions.
Inclusions
Gas bubbles and swirl marks visible internally, highly indicative of glass.
Blemishes
Conchoidal fracture ripples and surface chipping
Origin
Man-made / Industrial or decorative glass production
Treatment Detection
Colorant introduced during manufacturing (likely cobalt or copper glass)
Estimated Value
Nominal decorative or collector value (less than $10 USD)
Certification Estimate
Standard gemological laboratories (GIA, IGI) would issue a report identifying this as man-made glass.
Investment Potential
None; zero resale value as a gemstone
Similar Diamonds
None, as this is glass and not diamond
Setting Suggestions
Wire-wrapped or bezel setting if used for costume jewelry
Care & Maintenance
Avoid harsh impacts as glass is brittle and prone to chipping
Interesting Facts
Blue glass is frequently mistaken by novices for rough blue diamond or high-end aquamarine due to its intense color.