Not a diamond; appears to be a fragment of cobalt blue glass or synthetic material.
Not a diamond; appears to be a fragment of cobalt blue glass or synthetic material. · Irregular raw fragment / unstructured shard
Uncut / Raw fragment Cut
Carat
Not applicable (glass/slag fragment)
Color
Deep vivid blue (Fancy Dark Blue)
Clarity
Included with internal bubbles and flow lines (typical of glass)
Shape
Irregular raw fragment / unstructured shard
Overall Assessment
This specimen is a jagged fragment of colored glass rather than a diamond or precious gemstone, exhibiting characteristic conchoidal fractures and internal gas bubbles.
Cut Quality
Uncut / Raw fragment
Brilliance
Low to moderate vitreous luster
Fire
None (glass lacks the high dispersion of a diamond)
Scintillation
Poor due to lack of facets
Proportions
Not applicable
Symmetry
Asymmetric
Polish
Raw fractured surface, unpolished
Fluorescence
Inert to moderate inertness under standard lighting
Inclusions
Gas bubbles, flow lines, and internal stress fractures typical of manufactured glass
Blemishes
Surface chips, scratches, and conchoidal fractures
Origin
Man-made glass or industrial slag
Treatment Detection
Colored via cobalt additives
Estimated Value
Minimal value as decorative or industrial scrap glass
Certification Estimate
Not gradable by major gemological labs (GIA, AGS, IGI) as a gemstone
Investment Potential
None
Similar Diamonds
None, as this is visually identified as glass rather than diamond
Setting Suggestions
Not recommended for fine jewelry settings due to softness and material composition
Care & Maintenance
Handle with care to avoid sharp edges; clean with mild soapy water if desired
Interesting Facts
Cobalt blue glass is often mistaken by amateurs for high-grade blue sapphire or rough diamond finds due to its striking color.