Not a diamond; this specimen appears to be a raw, unpolished, highly saturated blue gemstone, likely synthetic glass, cobalt-doped glass, or a low-grade rough blue mineral like sapphire/spinel (though optical features strongly suggest raw glass or quartz with color).
Not a diamond; this specimen appears to be a raw, unpolished, highly saturated blue gemstone, likely synthetic glass, cobalt-doped glass, or a low-grade rough blue mineral like sapphire/spinel (though optical features strongly suggest raw glass or quartz with color). · Rough / Raw Uncut Crystal / Irregular Nugget
Not Applicable (Uncut Rough) Cut
Carat
Cannot be precisely determined from a 2D image, but visually estimated between 15 to 30 carats based on typical handheld mineral specimens.
Color
Fancy Deep Royal Blue / Vivid Cobalt Blue
Clarity
Included / Translucent to Opaque
Shape
Rough / Raw Uncut Crystal / Irregular Nugget
Overall Assessment
This item is an intensely colored rough blue mineral or glass specimen rather than a diamond. A professional gemological examination involving refractive index testing and magnification is recommended to determine the exact mineral species.
Cut Quality
Not Applicable (Uncut Rough)
Brilliance
Low to Moderate due to rough surface and lack of facet alignment.
Fire
Minimal to None
Scintillation
Poor due to lack of standard facet geometry.
Proportions
Not Applicable for rough material
Symmetry
Natural Irregular / Asymmetric
Polish
Raw / Unpolished (natural fracture surfaces and conchoidal breaks visible)
Fluorescence
Indeterminate without UV testing, though typical synthetic cobalt glasses can exhibit inert or chalky responses.
Inclusions
Internal stress fractures, gas bubbles (if glass), and internal veil-like structural patterns.
Blemishes
Surface pitting, conchoidal fractures, and natural rough edges.
Origin
Unknown / Likely manufactured or common locality rough specimen.
Treatment Detection
Potential coloration via metallic impurities or surface coating if glass; requires microscopic and spectroscopic analysis.
Estimated Value
Low commercial value (likely under $50 USD if glass or decorative mineral specimen).
Certification Estimate
Not eligible for standard diamond grading laboratories (GIA/AGS); would require a gemological testing center report (like GIA Colored Stone or IGI) to verify material composition.
Investment Potential
None as an investment asset.
Similar Diamonds
None (this is not a diamond). Comparable to cobalt-colored rough glass or synthetic spinel rough.
Setting Suggestions
Wire-wrapping or bespoke organic bezel setting if used for artisan jewelry.
Care & Maintenance
Keep away from harsh chemicals, ultrasonic cleaners, and sudden temperature drops to avoid thermal shock or cracking.
Interesting Facts
Intense cobalt blue colors in rough stones are frequently achieved in synthetic laboratory materials or decorative glass rather than high-end natural precious gems.