Natural Diamond (Coated/Treated Quartz or Imitation based on visible structure)
Natural Diamond (Coated/Treated Quartz or Imitation based on visible structure) · Rough/Raw Crystal with Faceted Edges
Fair Cut
Carat
Estimated 3.50 - 5.00 carats
Color
Fancy Brownish-Yellow with Iridescent Coating
Clarity
Included (I2/I3)
Shape
Rough/Raw Crystal with Faceted Edges
Overall Assessment
This specimen appears to be a mineral crystal (likely quartz or low-grade diamond/simulant) with an applied iridescent coating, showing significant natural inclusions and structural fractures.
Cut Quality
Fair
Brilliance
Low due to heavy inclusions and surface treatments
Fire
Minimal spectral dispersion
Scintillation
Poor flash-effect due to lack of standard facet alignment
Proportions
Non-standard rough crystal proportions
Symmetry
Poor to Fair
Polish
Fair with surface anomalies
Fluorescence
Faint to None
Inclusions
Heavy internal fractures, feathers, and included mineral crystals
Blemishes
Surface scratches, abrasions, and potential coating residue
Origin
Natural mineral specimen with artificial surface enhancement
Treatment Detection
Surface coating visible, showing thin-film interference (rainbow effect)
Estimated Value
$50 - $200 USD
Certification Estimate
Unlikely to be certified by major labs (GIA/AGS) in current state
Investment Potential
Low; primarily decorative or specimen value
Similar Diamonds
Low-grade industrial diamonds or coated quartz crystals
Setting Suggestions
Wire-wrap setting or bezel setting to protect fragile areas
Care & Maintenance
Avoid harsh chemicals, ultrasonic cleaners, and impact
Interesting Facts
Coated crystals often use a titanium or metallic vapor deposition to achieve rainbow sheens