Non-diamond (Glass/Quartz/Simulant)
Non-diamond (Glass/Quartz/Simulant) · Rough/Uncut Fragment
Uncut/Raw Cut
Carat
Indeterminate (Visual suggests several carats)
Color
Colorless with visible thin-film interference colors
Clarity
I3 (Included - presence of massive internal fractures)
Shape
Rough/Uncut Fragment
Overall Assessment
This specimen is not a faceted diamond. It exhibits conchoidal (shell-like) fracturing and luster inconsistent with diamond. It is most likely a fragment of quartz, glass, or a low-grade vitreous mineral.
Cut Quality
Uncut/Raw
Brilliance
Low (Shows vitreous luster rather than adamantine)
Fire
None (Rainbow effect is likely surface refraction/iridescence, not dispersion)
Scintillation
Low to none
Proportions
Asymmetric/Nautural fracture planes
Symmetry
N/A
Polish
N/A
Fluorescence
None visible
Inclusions
Extensive conchoidal fractures, internal veining, and step-like cleavage
Blemishes
Surface abrasions and jagged edges
Origin
Likely terrestrial mineral or industrial-grade simulant
Treatment Detection
None detected; appears to be raw material
Estimated Value
Low/Educational specimen value only
Certification Estimate
N/A (Likely would not be graded by GIA as a diamond)
Investment Potential
Negligible
Similar Diamonds
None; appears to be a glass or mineral fragment
Setting Suggestions
Not suitable for traditional jewelry settings; display specimen only
Care & Maintenance
Handle with care; sharp edges can cause injury and fractures are prone to spreading
Interesting Facts
The rainbow-like pattern visible is likely 'thin-film interference' caused by light reflecting between internal fracture gaps, a common trait in quartz and glass.