Not a diamond; this is a blue glass or slag specimen, exhibiting conchoidal fracture and internal flow lines characteristic of manufactured glass.
Not a diamond; this is a blue glass or slag specimen, exhibiting conchoidal fracture and internal flow lines characteristic of manufactured glass. · Raw, unpolished, irregular chunk with conchoidal fracture surfaces
Not applicable (raw, uncut material) Cut
Carat
Not applicable for a non-gem mineraloid specimen (approximate mass > 10 carats equivalent if measured in weight, but completely irrelevant as a gemstone)
Color
Deep vivid cobalt blue
Clarity
Included with internal bubbles and flow structures typical of glass
Shape
Raw, unpolished, irregular chunk with conchoidal fracture surfaces
Overall Assessment
This specimen is unquestionably a piece of blue glass or industrial slag, not a diamond or a gemstone. It shows characteristic conchoidal fractures, internal swirl lines, and gas bubbles entirely inconsistent with natural crystalline diamond growth.
Cut Quality
Not applicable (raw, uncut material)
Brilliance
Vitreous luster, low optical brilliance compared to diamond
Fire
Zero fire (dispersion is extremely low in standard glass)
Scintillation
Poor due to lack of precision facets
Proportions
Completely irregular proportions with no standard facet geometry
Symmetry
Asymmetrical raw fragment
Polish
Unpolished, rough fracture surfaces
Fluorescence
Inert to faint inertness depending on glass composition
Inclusions
Gas bubbles, swirl marks, and flow lines visible internally
Blemishes
Conchoidal fracture chips and rough edges
Origin
Man-made glass / industrial slag
Treatment Detection
Dyed or colored during manufacturing process
Estimated Value
Nominal decorative or collector value as a mineral specimen / cullet glass (less than $10 USD)
Certification Estimate
Not gradable by major diamond certification laboratories like GIA or AGS
Investment Potential
None as an investment asset
Similar Diamonds
None, as it is not a diamond or even a natural gemstone
Setting Suggestions
Wire-wrapping or bezel setting if used for craft or decorative jewelry purposes
Care & Maintenance
Standard cleaning with mild soap and water; avoid harsh impacts as glass is brittle
Interesting Facts
Cobalt blue glass is often mistaken by novices for rough blue sapphire or natural rough diamond due to its intense color