Not a diamond; appears to be a glass or synthetic crystal gemstone due to the irregular large facets, color, and lack of diamond-specific optical properties.
Not a diamond; appears to be a glass or synthetic crystal gemstone due to the irregular large facets, color, and lack of diamond-specific optical properties. · Custom round cabochon/faceted hybrid
Fair to Poor (Custom/imitation cut with irregular proportions) Cut
Carat
Significantly oversized for a gemstone; estimated >100 carats if solid material, likely costume jewelry stone.
Color
Deep olive green / yellowish-green
Clarity
Included (Contains visible surface marks and potential internal bubbles indicative of glass)
Shape
Custom round cabochon/faceted hybrid
Overall Assessment
The specimen displayed is a large, colored glass or imitation crystal stone set in a simple prong mount. It exhibits none of the optical or physical properties of a genuine natural or lab-grown diamond.
Cut Quality
Fair to Poor (Custom/imitation cut with irregular proportions)
Brilliance
Low to Moderate due to material composition
Fire
Minimal to none, uncharacteristic of diamond
Scintillation
Low, flat reflection patterns
Proportions
Non-standard proportions with a wide face and unusual facet layout
Symmetry
Fair
Polish
Moderate to Good
Fluorescence
Unknown without UV testing
Inclusions
Possible bubbles or internal fractures typical of molded glass
Blemishes
Visible surface abrasions and scratches on the table/facets
Origin
Synthetic / Manufactured glass or imitation crystal
Treatment Detection
Likely colored glass or coated imitation stone
Estimated Value
Nominal value (costume jewelry / decorative item)
Certification Estimate
Not eligible for GIA or major diamond grading reports (would be evaluated as costume jewelry or synthetic glass)
Investment Potential
None as an investment
Similar Diamonds
None (this is an imitation gemstone, not a diamond)
Setting Suggestions
Prong setting as currently mounted, suitable for decorative costume pieces
Care & Maintenance
Clean gently with warm soapy water and a soft cloth; avoid harsh chemicals and impact to prevent scratching
Interesting Facts
Large colored glass simulants are frequently used in vintage and modern costume jewelry to mimic high-end gemstones.