The provided image displays a rough, unprocessed natural diamond crystal, heavily included and contaminated with surface impurities.
The provided image displays a rough, unprocessed natural diamond crystal, heavily included and contaminated with surface impurities. · Irregular / Rough Crystal (Macle or distorted octahedral form)
Uncut / Rough (Not applicable for standardized cut grades) Cut

Carat
Estimated around 1.5 to 2.5 carats based on visual proportions
Color
Brownish / Off-color with heavy surface staining (Low commercial grade)
Clarity
I3 (Included - heavily fractured with numerous internal inclusions and surface cavities)
Shape
Irregular / Rough Crystal (Macle or distorted octahedral form)
Overall Assessment
This is a low-quality, heavily included raw natural diamond crystal, best appreciated as a geological specimen rather than a gemstone
Cut Quality
Uncut / Rough (Not applicable for standardized cut grades)
Brilliance
Extremely low to none, due to rough surface and opacity
Fire
Absent, blocked by surface opacity and internal fractures
Scintillation
Negligible flash of light due to lack of polished facets
Proportions
Natural uncut crystal form, highly asymmetrical with no standard table or pavilion angles
Symmetry
Poor / Natural distorted crystal symmetry
Polish
Raw natural crystal faces (some trigons or striations may be present)
Fluorescence
Unable to determine accurately without UV testing, likely inert or faint
Inclusions
Massive internal clouding, feather fractures, carbon spots, and mineral crystals
Blemishes
Surface naturals, pits, cavities, and heavy brown staining/discoloration
Origin
Natural alluvial or primary pipe deposit origin, likely unrefined run-of-mine rough
Treatment Detection
No evidence of artificial treatments; appears entirely untreated and natural
Estimated Value
Nominal industrial or specimen value, typically under $100-$300 depending on total weight and local market
Certification Estimate
Industrial or uncertified rough diamond; major labs like GIA would only issue a rough report
Investment Potential
Poor for investment; low resale value and primarily suited for industrial use or raw jewelry collectors
Similar Diamonds
Industrial-grade boart, low-quality uncut African or South American rough diamonds
Setting Suggestions
Best kept as a raw mineral specimen or set in a secure organic bezel setting if crafted into rustic jewelry
Care & Maintenance
Store separately to prevent scratching other stones; avoid harsh chemical cleaners which can penetrate surface fractures
Interesting Facts
Most diamonds mined are of industrial quality and never make it to the cutting wheel, instead being used for abrasives and cutting tools