The sample appears to be Quartz or Glass rather than a diamond based on the conchoidal fracture patterns and lack of adamant luster.
The sample appears to be Quartz or Glass rather than a diamond based on the conchoidal fracture patterns and lack of adamant luster. · Rough / Irregular fragment
Uncut / Natural Rough Cut
Carat
Estimated 20-40 carats based on visual scale
Color
Colorless (Clear) with a slight blue tint from environmental reflection
Clarity
Equivalent to Included (I) due to significant internal fractures and flow lines
Shape
Rough / Irregular fragment
Overall Assessment
This specimen is not a diamond. The visual characteristics such as the fracture pattern, surface luster, and lack of characteristic diamond growth habits (like octahedrons or triangles/trigons) indicate it is likely a piece of quartz or decorative glass.
Cut Quality
Uncut / Natural Rough
Brilliance
Low; exhibits vitreous (glassy) luster rather than the high refractive brilliance of diamond
Fire
Non-existent; the specimen lacks the dispersion necessary to split white light into spectral colors
Scintillation
Negligible; surface reflections only
Proportions
Not applicable; lacks defined geometric facets
Symmetry
Poor / Not applicable for rough material
Polish
None (Natural or fractured surface)
Fluorescence
Indeterminate from image
Inclusions
Heavy internal fracturing, step-like growth lines, and cleavage planes
Blemishes
Extensive surface abrasions and jagged edges typical of broken glass or silica
Origin
Terrestrial mineral (likely Quartz) or industrial glass byproduct
Treatment Detection
None detected; appears to be raw material
Estimated Value
$5 - $50 (Nominal value as a decorative mineral or glass fragment)
Certification Estimate
Unlikely to be graded by gemstone labs like GIA as a diamond; would likely be identified as mineral specimen
Investment Potential
None
Similar Diamonds
Does not share characteristics with faceted or gem-quality rough diamonds
Setting Suggestions
Wire wrapping for use as a pendant or display in a mineral collection
Care & Maintenance
Handle with care as the sharp edges and brittle nature suggest it can chip or shatter easily
Interesting Facts
The shell-like curvature seen in the breaks is called a conchoidal fracture, which is a key diagnostic feature for distinguishing glass and quartz from diamond.