Not a diamond; appears to be synthetic or natural blue glass/slag
Not a diamond; appears to be synthetic or natural blue glass/slag · Irregular raw shard / rough fragment
Not applicable (uncut raw fragment) Cut
Carat
Cannot accurately determine visually without precise density and volume measurements
Color
Deep cobalt blue
Clarity
Not applicable to diamond; contains bubbles and internal irregularities
Shape
Irregular raw shard / rough fragment
Overall Assessment
The specimen shown in the image is a vibrant blue translucent material with conchoidal fractures and internal bubbles, strongly indicating it is glass rather than a diamond or precious gemstone.
Cut Quality
Not applicable (uncut raw fragment)
Brilliance
Low, vitreous luster typical of glass
Fire
Very low dispersion compared to diamond
Scintillation
Minimal due to lack of standard facet patterns
Proportions
Irregular elongated shard with no standard proportions
Symmetry
Asymmetrical raw shard
Polish
Unpolished, raw fracture surfaces
Fluorescence
Not tested, likely inert
Inclusions
Gas bubbles and flow lines characteristic of glass
Blemishes
Surface conchoidal fractures
Origin
Man-made glass or industrial slag
Treatment Detection
None needed; material is synthetic glass
Estimated Value
Minimal ornamental or collectible value
Certification Estimate
Not applicable for grading laboratories like GIA or AGS
Investment Potential
None
Similar Diamonds
None (this material is not a diamond)
Setting Suggestions
Wire wrapping or bezel setting if used for craft purposes
Care & Maintenance
Standard gentle cleaning with mild soap and warm water; avoid hard impacts
Interesting Facts
Cobalt blue glass is often mistaken for high-grade rough sapphire or tanzanite by untrained observers