Non-diamond (Likely Glass/Cullet)
Non-diamond (Likely Glass/Cullet) · Rough/Amorphous
Uncut/Rough Cut
Carat
Estimated at 5-10 carats based on visual scale
Color
Vivid Cobalt Blue
Clarity
Translucent with heavy visible inclusions
Shape
Rough/Amorphous
Overall Assessment
The specimen shown is not a diamond. It is a piece of cobalt blue glass or slag, identifiable by its amorphous shape, conchoidal fractures, and lack of characteristic diamond lustre or crystalline structure.
Cut Quality
Uncut/Rough
Brilliance
Low (Surface reflection only)
Fire
None visible
Scintillation
None
Proportions
Asymmetric/Random
Symmetry
N/A (Rough state)
Polish
N/A (Natural/Fractured surface)
Fluorescence
Non-fluorescent
Inclusions
Visible bubbles, flow lines, and swirling surface textures
Blemishes
Heavy surface abrasion and conchoidal fracturing
Origin
Man-made industrial glass (Cullet) or slag
Treatment Detection
Color is likely due to the composition of the material (e.g., cobalt glass)
Estimated Value
Low/Ornamental value (Under $10)
Certification Estimate
N/A (Not a gemstone quality diamond)
Investment Potential
Low to none
Similar Diamonds
None (The item does not exhibit diamond optical properties)
Setting Suggestions
Wire-wrapped jewelry or art display
Care & Maintenance
Avoid high heat; clean with lukewarm soapy water and soft brush
Interesting Facts
The conchoidal fracture pattern visible in the image is a classic diagnostic feature of glass and silica-based materials, distinct from diamond cleavage.