Probable Natural Sapphire or Cobal-diffused Spinel (Non-Diamond)
Probable Natural Sapphire or Cobal-diffused Spinel (Non-Diamond) · Rough / Uncut Unstructured
N/A (Rough State) Cut
Carat
Estimated 5.0 - 15.0 carats (Raw State)
Color
Fancy Deep Blue / Royal Blue
Clarity
Translucent (Visible Internal Cloudiness)
Shape
Rough / Uncut Unstructured
Overall Assessment
This appears to be a natural mineral specimen, likely a sapphire or spinel, rather than a diamond. It lacks the crystal habit/geometry and adamantine luster characteristic of rough diamonds.
Cut Quality
N/A (Rough State)
Brilliance
Very Low (due to rough surface and opacity)
Fire
None detected in current state
Scintillation
None
Proportions
N/A
Symmetry
N/A
Polish
N/A (Natural Surface Texture)
Fluorescence
Indeterminate under standard lighting; possible strong red in LWUV if Spinel
Inclusions
Heavy internal cloudiness, color zoning, and microscopic particulates
Blemishes
Surface pitting and adhering matrix/oxidized rock
Origin
Likely Southeast Asia (Vietnam or Myanmar) based on matrix
Treatment Detection
Potential diffusion or heat treatment common for this color saturation
Estimated Value
$50 - $500 (Highly dependent on species and treatment status)
Certification Estimate
GIA Colored Stone Identification Report (Blue Sapphire/Spinel)
Investment Potential
Low; primarily a specimen or carving-grade material
Similar Diamonds
Compare to Rough Blue Diamonds (though this lacks Adamantine luster)
Setting Suggestions
Bespoke organic claw setting or rough-stone pendant
Care & Maintenance
Avoid ultrasonic cleaners; clean with soft brush and lukewarm water
Interesting Facts
The deep blue color in natural stones is often caused by trace amounts of Iron and Titanium.