Not a diamond (appears to be Moldavite or green glass with conchoidal fracture)
Not a diamond (appears to be Moldavite or green glass with conchoidal fracture) · Rough uncut crystal shard / Irregular
Not applicable (Raw unpolished mineral specimen) Cut
Carat
Estimated 15-25 carats based on visual size
Color
Deep olive green / Natural fancy dark green
Clarity
Included (Contains visible linear bubbles and debris typical of impact glasses)
Shape
Rough uncut crystal shard / Irregular
Overall Assessment
This specimen is definitively not a diamond. Visually, it exhibits the characteristic conchoidal fracture, olive-green color, and texture consistent with Moldavite (impact glass), making it an interesting collector's mineral specimen rather than a gemstone.
Cut Quality
Not applicable (Raw unpolished mineral specimen)
Brilliance
Vitrous luster, moderate glassy reflection
Fire
Low dispersion compared to diamond
Scintillation
Limited flash due to irregular raw facets
Proportions
Non-standard organic rough form
Symmetry
Asymmetrical raw shard
Polish
Natural unpolished surfaces with conchoidal fracture ripples
Fluorescence
Inert to faint
Inclusions
Elongated gas bubbles, flow lines, and lechatelierite inclusions
Blemishes
Natural surface pitting and rough edges
Origin
Bohemian region, Czech Republic (Moldau River valley) if true moldavite
Treatment Detection
None detected; appears to be natural impact glass
Estimated Value
Depends on authenticity and weight, typically $50 to $200 for a raw moldavite specimen of this size
Certification Estimate
Gemological testing would identify this as a tektite (Moldavite) rather than diamond; GIA does not issue standard diamond reports for this material
Investment Potential
Moderate collectible value, highly dependent on the moldavite collector market trends
Similar Diamonds
None (this is not a diamond; comparable specimens are tektites or green obsidians)
Setting Suggestions
Wire-wrapped pendant or bespoke bezel setting in yellow or white gold
Care & Maintenance
Avoid harsh chemicals, ultrasonic cleaners, and hard impacts as glass/tektite is brittle and prone to chipping
Interesting Facts
Moldavite is a tektite formed by a meteorite impact approximately 15 million years ago in the Miocene epoch