Industrial Diamond / Rough Carbonado or Synthetic Carbon
Industrial Diamond / Rough Carbonado or Synthetic Carbon · Rough / Uncut irregular fragment
Poor / Uncut rough Cut
Carat
Estimated 2.5 - 4.0 carats based on visible mass
Color
Fancy Dark Gray to Black
Clarity
Included (I3 / Industrial grade)
Shape
Rough / Uncut irregular fragment
Overall Assessment
An unpolished, dark industrial-grade diamond or carbonado fragment lacking gem-quality optical properties, suitable primarily for technical applications rather than jewelry
Cut Quality
Poor / Uncut rough
Brilliance
Very low due to opaque color and lack of faceting
Fire
Absent due to opacity
Scintillation
Minimal, localized on flat cleavage planes
Proportions
Not applicable due to rough, unpolished state
Symmetry
Asymmetrical rough formation
Polish
Unpolished natural crystal surface with some conchoidal fracture luster
Fluorescence
None to Inert
Inclusions
Heavy internal clouding, feathers, and graphitization typical of lower-grade or industrial material
Blemishes
Natural surface pits, trigons, and rough cleavage planes
Origin
Natural rough mineral deposit or synthetic industrial diamond grit
Treatment Detection
No obvious artificial treatments detected; consistent with untreated natural rough
Estimated Value
Low commercial value ($20 - $100 depending on industrial utility)
Certification Estimate
Industrial evaluation only (typically not graded by major gemological institutes like GIA for jewelry)
Investment Potential
None; strictly utilitarian or mineral specimen value
Similar Diamonds
Industrial-grade bort, carbonado, or abrasive diamond fragments
Setting Suggestions
Raw mineral bezel setting or heavy industrial mounting
Care & Maintenance
Standard mineral care; avoid hard impacts as cleavage planes can cause fracturing
Interesting Facts
Industrial diamonds like this make up the vast majority of mined diamonds globally by weight, primarily used for cutting, grinding, and drilling tools