Possibly Cobalt Glass or Synthetic Spinel (Non-Diamond)
Possibly Cobalt Glass or Synthetic Spinel (Non-Diamond) · Rough / Uncut fragment
N/A (Rough/Uneven) Cut
Carat
Estimated 2.0 - 5.0 carats based on image scale
Color
Fancy Vivid Blue / Cobalt Blue
Clarity
Transluncent to Opaque with visible internal fractures
Shape
Rough / Uncut fragment
Overall Assessment
This specimen does not exhibit the crystal structure, luster, or refractive properties of a diamond. It appears to be a fragment of blue glass or industrial slag.
Cut Quality
N/A (Rough/Uneven)
Brilliance
Low; surface reflection only
Fire
None visible
Scintillation
Low to None
Proportions
Asymmetric and irregular
Symmetry
N/A (Natural/Raw form)
Polish
N/A (Rough surface with conchoidal fractures)
Fluorescence
Inconclusive from photo; potential red under LW radiation if synthetic
Inclusions
Heavy veining, bubbles, and internal clouding
Blemishes
Conchoidal fracturing and sharp, jagged edges typical of glass
Origin
Likely manufactured glass or industrial byproduct
Treatment Detection
Highly likely to be dyed or chemically colored glass
Estimated Value
$1 - $20 USD (Decorative value only)
Certification Estimate
Likely to be identified as non-diamond glass or stimulant by GIA/IGI
Investment Potential
Zero; this material does not hold gemstone investment value
Similar Diamonds
None; appearance is inconsistent with natural blue diamonds (Type IIb)
Setting Suggestions
Not suitable for fine jewelry; wire wrapping for costume use only
Care & Maintenance
Avoid high heat and impact as glass is brittle and prone to shattering
Interesting Facts
The deep blue hue and conchoidal fractures are classic indicators of man-made cobalt-colored glass.