Natural rough diamond crystal
Natural rough diamond crystal · Rough elongated crystal (uncut octahedral/dodecahedral habit with characteristic striations)
Not applicable (Rough, unpolished crystal specimen) Cut
Carat
Estimated 3.5 to 4.5 carats
Color
Light yellow to yellowish-green (Cape series faint yellow)
Clarity
Included (I1 to I2 range due to internal fractures and mineral spots)
Shape
Rough elongated crystal (uncut octahedral/dodecahedral habit with characteristic striations)
Overall Assessment
An interesting, natural rough diamond crystal displaying characteristic growth lines and mineral staining, ideal for mineral collectors or custom lapidary work
Cut Quality
Not applicable (Rough, unpolished crystal specimen)
Brilliance
Low to moderate due to rough surface and internal fracturing
Fire
Subdued due to unpolished faces diffusing light
Scintillation
Limited flash effect from natural crystal windows
Proportions
Natural elongated crystal habit; standard table/depth proportions do not apply
Symmetry
Natural crystal symmetry (elongated growth form with curved faces)
Polish
Natural crystal surface texture with triangular growth markings (trigons) and striations
Fluorescence
Indeterminate from visual inspection (typically inert to medium blue in natural rough)
Inclusions
Internal feather fractures, pinpoints, and potential mineral crystal inclusions
Blemishes
Surface cavities, natural etch channels, and adhering brown matrix/skin
Origin
Alluvial or primary kimberlite deposit origin
Treatment Detection
Untreated natural rough crystal showing native surface textures
Estimated Value
Varies by weight and specific purity, typically lower per carat as rough material until cut and polished
Certification Estimate
GIA or similar major laboratory would issue a rough diamond report
Investment Potential
Held mainly as a mineral specimen or speculative raw material for custom cutting
Similar Diamonds
Other alluvial or mine-run rough diamond crystals of similar size and clarity
Setting Suggestions
Raw mineral jewelry setting using a wire-wrap or protective bezel in yellow gold or platinum
Care & Maintenance
Store separately to avoid scratching other gems; clean gently with warm soapy water and a soft brush
Interesting Facts
Rough diamonds display natural growth features like trigons—triangular depressions formed by dissolving fluids deep within the Earth