Probable Glass or Silicon Carbonate (Non-Diamond)
Probable Glass or Silicon Carbonate (Non-Diamond) · Rough/Irregular Fragment
N/A (Rough/Uncut) Cut
Carat
Estimated 15-25 carats (based on size relative to fingers)
Color
Colorless with intense spectral dispersion
Clarity
Included (Visible internal fractures/flow lines)
Shape
Rough/Irregular Fragment
Overall Assessment
The specimen appears to be a shard of colorless glass or a similar synthetic material rather than a diamond. The way it has broken and the lack of a specific crystal habit (like an octahedron) strongly suggest it is not a gemstone.
Cut Quality
N/A (Rough/Uncut)
Brilliance
Low (Surface reflections only)
Fire
High (Rainbow effect visible at the top and bottom edges is likely an optical prism effect from thin-film interference or thickness in glass)
Scintillation
None
Proportions
N/A (Irregular shard)
Symmetry
Poor/Asymmetric
Polish
N/A (Rough surface)
Fluorescence
Indeterminate from image
Inclusions
Conchoidal fracture patterns, internal flow lines, and massive cleavage planes
Blemishes
Jagged, irregular edges consistent with broken glass or industrial slag
Origin
Manufactured (Likely glass shard or industrial silicon)
Treatment Detection
N/A
Estimated Value
Minimal to $0 (Industrial or decorative value only)
Certification Estimate
Unlikely to be graded by GIA/AGS as a diamond; would likely be identified as glass or synthetic by a gemological lab
Investment Potential
None
Similar Diamonds
None (Does not exhibit natural diamond habit or crystal structure)
Setting Suggestions
Not recommended for fine jewelry setting in its current state
Care & Maintenance
Handle with care to avoid cuts from sharp edges
Interesting Facts
The specimen exhibits 'conchoidal' fractures (rounded, shell-like breaks) which are characteristic of glass and not the octahedral cleavage found in diamonds