Not a diamond (appears to be a tumbled stone or mineral, possibly black tourmaline or onyx with quartz veins)
Not a diamond (appears to be a tumbled stone or mineral, possibly black tourmaline or onyx with quartz veins) · Tumbled irregular / Pebble
Not applicable (tumbled/polished mineral) Cut
Carat
Not applicable (measured in grams, visually weighs over 100 carats as a mineral specimen)
Color
Black with white/grey veining
Clarity
Opaque / Heavily included
Shape
Tumbled irregular / Pebble
Overall Assessment
The object in the image is a tumbled opaque black stone with white veins, commonly sold as a crystal or mineral specimen. It is definitively not a diamond and lacks all standard gemological diamond grading characteristics.
Cut Quality
Not applicable (tumbled/polished mineral)
Brilliance
Low to none (opaque material)
Fire
None
Scintillation
None
Proportions
Irregular tumbled nugget dimensions
Symmetry
Asymmetrical tumbled shape
Polish
Waxy to vitreous tumble-polish
Fluorescence
None
Inclusions
Heavy natural mineral inclusions and veining
Blemishes
Surface pits and natural fractures smoothed by tumbling
Origin
Natural mineral specimen, likely sourced from commercial tumbling rough globally
Treatment Detection
None (natural tumbled mineral)
Estimated Value
Low commercial value ($5 - $20 as a mineral specimen)
Certification Estimate
Not gradable by diamond grading laboratories (GIA/AGS/IGI do not certify tumbled non-gem minerals)
Investment Potential
None as an investment; collectible or ornamental only
Similar Diamonds
None (this is not a diamond)
Setting Suggestions
Wire-wrapping or bespoke cage setting for decorative use
Care & Maintenance
Standard mineral care; avoid harsh chemicals and ultrasonic cleaning depending on exact mineral composition
Interesting Facts
Tumbled stones are often used for metaphysical purposes, meditation, or lapidary display rather than jewelry