Not a diamond; likely Moldavite or a green tektite/glass
Not a diamond; likely Moldavite or a green tektite/glass · Irregular tumbled / rough nodule
Not applicable (uncut or tumbled natural rough) Cut
Carat
Estimated around 15-20 carats based on visual proportions
Color
Deep forest green (natural fancy color)
Clarity
Included (contains characteristic bubbles and flow lines typical of natural impact glass)
Shape
Irregular tumbled / rough nodule
Overall Assessment
An intriguing specimen of natural impact glass (Moldavite) rather than a gemstone diamond, highly valued by collectors for its extraterrestrial origin story and distinct green hue.
Cut Quality
Not applicable (uncut or tumbled natural rough)
Brilliance
Vitreous luster with muted inner reflection due to deep coloration
Fire
Very low to none, characteristic of glass-like silicates
Scintillation
Low, limited by opaque/dark green saturation
Proportions
N/A for rough or tumbled specimens
Symmetry
Asymmetrical natural form
Polish
Smooth, naturally etched or slightly polished surface
Fluorescence
None to inert
Inclusions
Lechatelierite inclusions, gas bubbles, and swirling textures
Blemishes
Natural surface pitting and impact texturing
Origin
Bohemian region, Czech Republic (Moldau River valley impact site)
Treatment Detection
No treatments detected; natural moldavite texture visible
Estimated Value
$100 - $300 depending on exact weight and origin verification
Certification Estimate
Gemological laboratories (GIA, GRS) would classify this as Tektite (Moldavite)
Investment Potential
Moderate collectible value as authentic Moldavite deposits become scarcer
Similar Diamonds
None, as this is a tektite glass rather than crystallized carbon
Setting Suggestions
Wire-wrapped in sterling silver or custom organic gold bezel to highlight its unique raw texture
Care & Maintenance
Avoid harsh chemicals, ultrasonic cleaners, and hard impacts due to glass-like fragility (Mohs hardness ~5.5)
Interesting Facts
Formed approximately 15 million years ago by a meteorite impact in the Ries crater region of southern Germany