Natural (Fancy Deep Blue / Industrial Grade Crystal)
Natural (Fancy Deep Blue / Industrial Grade Crystal) · Rough (Crystal form, likely Octahedral or Dodecahedral fragment)
N/A (Rough Uncut Crystal) Cut
Carat
Estimated 2.5 - 4.5 carats in its rough state
Color
Fancy Deep Blue (Saturation appears intense due to impurities or boron content)
Clarity
I1 to I3 (Included / Opaque based on surface texture and matrix interference)
Shape
Rough (Crystal form, likely Octahedral or Dodecahedral fragment)
Overall Assessment
This appears to be a natural rough gemstone crystal embedded in a terrestrial matrix. While it mimics a Fancy Deep Blue diamond, a gemological test for refractive index and thermal conductivity is necessary to distinguish it from blue sapphire or spinel.
Cut Quality
N/A (Rough Uncut Crystal)
Brilliance
Very Low (Light is absorbed/scattered rather than reflected due to rough surfaces)
Fire
Very Low (Minimal dispersion visible in unpolished state)
Scintillation
None (Lack of facets prevents scintillation patterns)
Proportions
Non-standard (Irregular rough crystal dimensions)
Symmetry
Poor (Natural uneven growth patterns)
Polish
N/A (Raw natural surface with matrix residue)
Fluorescence
Indeterminable (Requires UV light source, but common in natural blue stones)
Inclusions
Cloudy zones, surface graining, and matrix inclusions at the base
Blemishes
Nick, pits, and structural fractures typical of rough extraction
Origin
Likely hydrothermal or metamorphic rock matrix; possible African or Indian origin
Treatment Detection
Suspected irradiation or dye if color is not natural; requires spectroscopic analysis
Estimated Value
$500 - $2,500 (Value highly dependent on authenticity; if verified as Type IIb blue, value increases)
Certification Estimate
GIA (Colored Diamond Grading Report) - Rough assessment
Investment Potential
Moderate to Low (Rough diamonds are volatile; value is realized after professional cutting)
Similar Diamonds
Rough Blue Spinel or Lapis Lazuli fragments (often mistaken for blue diamond)
Setting Suggestions
Wire-wrapped pendant or custom claw setting for 'raw gemstone' jewelry
Care & Maintenance
Avoid ultrasonic cleaners; clean with soft brush and room-temperature soapy water
Interesting Facts
Natural blue diamonds are colored by boron atoms replacing carbon in the crystal lattice