Not a diamond; visual characteristics strongly suggest quartz, glass, or obsidian exhibiting conchoidal fracture and iridescent surface films.
Not a diamond; visual characteristics strongly suggest quartz, glass, or obsidian exhibiting conchoidal fracture and iridescent surface films. · Irregular / Raw Crystalline Fragment
Not applicable (Rough, un-faceted material) Cut
Carat
Not applicable for non-diamond mineral sample (substantial mass visual estimate > 50ct equivalent)
Color
Colorless with iridescent surface sheen
Clarity
Not applicable
Shape
Irregular / Raw Crystalline Fragment
Overall Assessment
The specimen shown in the image is definitively not a diamond. It displays conchoidal fracture patterns, parallel striations, and surface iridescence characteristic of glass, quartz, or obsidian rather than the octahedral cleavage and high refractive index of a diamond.
Cut Quality
Not applicable (Rough, un-faceted material)
Brilliance
Vitreous to sub-adamantine luster
Fire
Low dispersion compared to diamond
Scintillation
Reflective flash effect on curved fracture planes
Proportions
Non-standard irregular geometry
Symmetry
Asymmetrical natural fracture pattern
Polish
Raw vitreous fracture texture
Fluorescence
Unknown without UV testing
Inclusions
Internal stress fractures, bubbles (if glass), or mineral planes
Blemishes
Surface conchoidal ripple marks and striations
Origin
Natural mineral or manufactured glass
Treatment Detection
Possible surface coating (iridescent film)
Estimated Value
Minimal monetary value as a decorative mineral specimen
Certification Estimate
Gemological laboratories would not issue a diamond grading report for this material.
Investment Potential
None
Similar Diamonds
None, as this material is not a diamond
Setting Suggestions
Wire-wrapped or bezel setting suitable for raw mineral specimens
Care & Maintenance
Standard mineral care; avoid harsh chemicals and impact to prevent cleavage or fracture
Interesting Facts
Displays distinct conchoidal fracture typical of brittle materials like quartz, glass, and obsidian.