Not a diamond (appears to be quartz, glass, or a synthetic silicate crystal with striations and conchoidal fracture patterns)
Not a diamond (appears to be quartz, glass, or a synthetic silicate crystal with striations and conchoidal fracture patterns) · Rough crystal / Irregular fragment
Not applicable (Rough, unpolished crystal fragment) Cut
Carat
Estimated 3.5 to 5.0 carats based on visual size
Color
Near Colorless to Light Brownish tint
Clarity
I2 to I3 (Heavy inclusions, internal fractures, and striations)
Shape
Rough crystal / Irregular fragment
Overall Assessment
This specimen is definitively not a diamond. It exhibits characteristic growth striations and conchoidal fractures typical of quartz, rough glass, or other silicate minerals rather than the octahedral or dodecahedral habit of rough diamond.
Cut Quality
Not applicable (Rough, unpolished crystal fragment)
Brilliance
Low to moderate due to internal fracturing and rough surfaces
Fire
Minimal dispersion visible
Scintillation
Poor due to lack of standard facet arrangement
Proportions
Non-standard rough geometry, depth and table percentages do not apply
Symmetry
Irregular / Asymmetrical rough form
Polish
Unpolished natural or fractured surface
Fluorescence
Indeterminate from visual inspection
Inclusions
Extensive internal feather fractures, striations, and parallel growth lines
Blemishes
Surface chips, natural irregularities, and fracture lines breaking the surface
Origin
Natural mineral specimen or synthetic slag/glass
Treatment Detection
Visual inspection suggests raw, untreated crystal, though glass or quartz simulants can be molded
Estimated Value
Nominal value as a mineral specimen or raw crystal fragment ($5 - $20)
Certification Estimate
Major grading labs (GIA, AGS, IGI) would not certify this as a diamond
Investment Potential
None as an investment gem; purely decorative or educational
Similar Diamonds
None (this specimen lacks diamond crystal morphology and physical properties)
Setting Suggestions
Wire-wrapped pendant or organic raw stone setting if mounted as jewelry
Care & Maintenance
Handle with care to prevent further breakage along internal fracture lines; avoid harsh chemicals
Interesting Facts
The visible linear striations strongly indicate a mineral like quartz or tourmaline, or potentially industrial slag, rather than a cubic crystal system diamond