Synthetic Slag / Industrial Glass (Not a Diamond)
Synthetic Slag / Industrial Glass (Not a Diamond) · Irregular / Rough Shard or Fragment
Uncut/Raw fragment Cut
Carat
Estimated at 20-40 carats based on finger size
Color
Near-colorless with strong iridescent thin-film interference
Clarity
I3 or below (Highly fractured/included)
Shape
Irregular / Rough Shard or Fragment
Overall Assessment
This specimen is not a diamond. The conchoidal fracture patterns and the specific nature of the rainbow iridescence are characteristic of industrial glass or a common synthetic material, rather than the crystal structure of a natural diamond.
Cut Quality
Uncut/Raw fragment
Brilliance
Low; lacks geometric facets to return light
Fire
High iridescent effect caused by surface film or internal stress (Thin-film interference)
Scintillation
Low to None
Proportions
Not applicable for a rough shard
Symmetry
None / Asymmetrical
Polish
None / Natural conchoidal fracture surfaces
Fluorescence
Inconclusive from image; likely none
Inclusions
Extensive internal stress fractures and cooling lines
Blemishes
Conchoidal (shell-like) fractures and chips throughout surface
Origin
Industrial byproduct or discard glass
Treatment Detection
No gemological treatments; standard industrial formation
Estimated Value
Negligible market value ($0 - $5)
Certification Estimate
N/A - Not a gemstone quality material
Investment Potential
None
Similar Diamonds
None; characteristics do not match diamond
Setting Suggestions
Not suitable for standard jewelry setting
Care & Maintenance
Handle with care as edges are sharp and it may be brittle
Interesting Facts
The rainbow effect is likely caused by light interference within thin cracks or a chemical film, often seen in man-made glass.