Not a diamond (appears to be a blue glass or synthetic material, not carbon-based)
Not a diamond (appears to be a blue glass or synthetic material, not carbon-based) · Rough elongated bar / uncut rectangular slab
Uncut / Raw rough shape Cut
Carat
Cannot be reliably determined visually, estimated rough weight roughly 15-25 carats equivalent volume
Color
Deep Fancy Blue (non-diamond color scale)
Clarity
Not applicable to rough glass material
Shape
Rough elongated bar / uncut rectangular slab
Overall Assessment
Visual inspection clearly indicates this is a piece of blue glass or synthetic simulant rather than a genuine diamond or precious gemstone.
Cut Quality
Uncut / Raw rough shape
Brilliance
Low due to lack of standard facet geometry
Fire
None, as it lacks dispersion properties of diamond
Scintillation
Minimal to none
Proportions
Elongated slab proportions
Symmetry
Irregular rough symmetry
Polish
Raw, unpolished surface with typical conchoidal fractures of glass
Fluorescence
Cannot be determined without UV testing
Inclusions
Bubbles or internal manufacturing anomalies typical of glass
Blemishes
Surface flow lines and chips
Origin
Man-made / Industrial or decorative glass
Treatment Detection
Dyed or colored glass composition
Estimated Value
Nominal value as decorative glass or specimen material, minimal monetary value
Certification Estimate
GIA or other major labs would issue a report identifying it as simulated/man-made glass
Investment Potential
None as a gemstone investment
Similar Diamonds
None, this is definitively not a diamond
Setting Suggestions
Not suitable for fine jewelry setting
Care & Maintenance
Standard handling, avoid harsh impacts as glass is brittle
Interesting Facts
Cobalt or other metal oxides are typically used to achieve this intense royal blue coloration in decorative glass