Not a diamond; appears to be raw quartz, glass, or another crystalline mineral / simulant due to conchoidal fracture patterns and structure
Not a diamond; appears to be raw quartz, glass, or another crystalline mineral / simulant due to conchoidal fracture patterns and structure · Uncut or raw crystalline slab / irregular piece
Not Applicable (uncut rough or raw mineral slice) Cut
Carat
Cannot be accurately determined by visual estimation alone (size appears substantial, but specific gravity differs from diamond)
Color
Colorless / Transparent with inclusions
Clarity
Included (contains visible internal bubbles, fractures, and structural irregularities typical of glass or quartz)
Shape
Uncut or raw crystalline slab / irregular piece
Overall Assessment
The specimen shown in the image lacks the characteristic crystal habit, hardness, optical properties, and facet structure of a diamond. It is most likely a raw piece of quartz, optical glass, or another transparent mineral simulant.
Cut Quality
Not Applicable (uncut rough or raw mineral slice)
Brilliance
Low to Moderate due to lack of standard facet geometry
Fire
Minimal dispersion compared to a properly cut diamond
Scintillation
Poor due to irregular shape and lack of facet structure
Proportions
Not Applicable
Symmetry
Irregular
Polish
Rough/Raw with uneven surfaces
Fluorescence
Unable to determine without UV testing
Inclusions
Gas bubbles, internal fractures, and crystal or mineral inclusions visible
Blemishes
Surface scratches, pitting, and uneven cleavage/fracture planes
Origin
Natural mineral or manufactured glass/simulant
Treatment Detection
Requires advanced spectroscopic testing to rule out artificial creation or treatments
Estimated Value
Nominal / Low decorative or mineral specimen value
Certification Estimate
Standard gemological labs (GIA, IGI) would not certify this as a diamond
Investment Potential
None as an investment gemstone
Similar Diamonds
None (this specimen is not a diamond)
Setting Suggestions
Wire-wrapped or bezel setting if used as a raw mineral pendant
Care & Maintenance
Standard handling for quartz or delicate mineral specimens; avoid harsh chemicals and impact
Interesting Facts
The conchoidal fracture lines visible on the surface strongly suggest glass or quartz rather than diamond crystal growth habits (which typically show octahedral forms)