Rough Crystal / Not a Diamond
Rough Crystal / Not a Diamond · Irregular / Uncut / Natural Rough
N/A (Uncut/Rough) Cut
Carat
Requires physical measurement; visual estimate unavailable due to lack of scale
Color
Near-colorless with prominent rainbow-like surface iridescence
Clarity
Included (I) - Visible fractures and internal textures
Shape
Irregular / Uncut / Natural Rough
Overall Assessment
The specimen does not exhibit the crystal habit, luster, or fracture pattern of a natural diamond. The shell-like (conchoidal) fractures and surface sheen strongly suggest a silica-based mineral or glass.
Cut Quality
N/A (Uncut/Rough)
Brilliance
Low; surface reflects light rather than refracting it through facets
Fire
High surface iridescence (thin-film interference), not gemological fire
Scintillation
Poor; lacks the geometric structure to produce pattern sparkle
Proportions
Natural geological form; no mathematical proportions applied
Symmetry
N/A (Rough state)
Polish
N/A (Natural surface texture)
Fluorescence
Indeterminable from photo
Inclusions
Conchoidal fractures, visible internal veining, and cloudy regions
Blemishes
Natural surface pitting and heavy striations
Origin
Likely common mineral (Quartz) or glass cullet provided the fracture patterns
Treatment Detection
Surface coating possibly responsible for rainbow sheen
Estimated Value
Minimal decorative or specimen value ($5-$50)
Certification Estimate
Unlikely to be certified by GIA/AGS as a gem-quality diamond; likely identified as quartz or glass
Investment Potential
None
Similar Diamonds
None; characteristics more similar to Rainbow Quartz or Aura Quartz
Setting Suggestions
Wire-wrapped pendant or kept as a raw mineral specimen
Care & Maintenance
Avoid harsh chemicals that might strip surface iridescence; clean with mild soap and water
Interesting Facts
The rainbow effect seen is likely thin-film interference on a fracture or coating rather than diamond dispersion