Natural diamond crystal (rough specimen)
Natural diamond crystal (rough specimen) · Rough crystal / Irregular octahedral fragment
Not applicable (uncut rough specimen) Cut
Carat
Estimated 3.5 to 5.0 carats based on size relative to fingers
Color
Estimated H to J (near colorless with slight warmth)
Clarity
Estimated SI2 to I1 (visible inclusions and surface irregularities)
Shape
Rough crystal / Irregular octahedral fragment
Overall Assessment
A raw, unpolished natural diamond crystal showing characteristic growth lines and surface textures, ideal for custom lapidary work or as a geological mineral specimen.
Cut Quality
Not applicable (uncut rough specimen)
Brilliance
Limited brilliance due to rough, unpolished surface
Fire
Minimal visible fire on raw surfaces
Scintillation
Low scintillation prior to cutting and faceting
Proportions
Uncut crystal, standard table/depth proportions do not apply
Symmetry
Natural asymmetrical rough formation
Polish
Natural unpolished crystal faces (trigons and striations visible)
Fluorescence
Cannot be determined without UV testing (likely none to moderate blue)
Inclusions
Internal clouds, feathers, and crystal inclusions typical of rough diamond
Blemishes
Natural surface pitting, rough fractures, and triangular growth marks (trigons)
Origin
Natural geological origin, alluvial or primary kimberlite deposit
Treatment Detection
No signs of artificial treatments; entirely natural rough stone
Estimated Value
Varies widely by actual weight and cutting potential, rough value approximately $500 to $1,500
Certification Estimate
GIA or similar major lab would grade this as a rough diamond or post-cut if faceted
Investment Potential
Moderate, primarily valued as a specimen or for potential yield after cutting
Similar Diamonds
Comparable to industrial or lower-gem grade octahedral rough parcels
Setting Suggestions
Best suited for a bespoke uncut rough diamond setting or professional custom cutting
Care & Maintenance
Store separately to prevent scratching other materials; clean gently with warm soapy water
Interesting Facts
Rough diamonds display natural growth features like trigons which are unique triangular indentations formed by natural etching