Non-diamond (Fossilized Brachiopod or Mollusk)
Non-diamond (Fossilized Brachiopod or Mollusk) · Natural/Uncut (Biological form)
N/A Cut
Carat
Estimated 10-25 carats equivalent based on volume
Color
Opaque Gray-Beige
Clarity
Opaque (N/A)
Shape
Natural/Uncut (Biological form)
Overall Assessment
This is not a diamond or a gemstone. It is a fossilized shell, identifiable by its curved shape, nested growth lines, and opaque, limestone-like surface texture.
Cut Quality
N/A
Brilliance
None
Fire
None
Scintillation
None
Proportions
Natural convex shell structure
Symmetry
Bilateral (biological symmetry)
Polish
Unpolished/Matte
Fluorescence
Non-reactive
Inclusions
Sedimentary matrix and mineralized shell layers
Blemishes
Surface erosion and pitting
Origin
Sedimentary rock formation (Marine origin)
Treatment Detection
None detected; natural state
Estimated Value
$1 - $10 (Nominal/Sentimental)
Certification Estimate
N/A (Would require paleontological evaluation rather than gemological)
Investment Potential
None (Geological curiosity/collectible only)
Similar Diamonds
None; this is a fossilized marine organism
Setting Suggestions
Wire wrap or display case
Care & Maintenance
Keep dry and away from acidic cleaners to prevent erosion of the calcium carbonate structure
Interesting Facts
This specimen displays growth rings characteristic of a prehistoric marine invertebrate, likely a brachiopod or bivalve.