Not a diamond; this specimen appears to be an unpolished or rough mineral crystal, possibly carbonado (black diamond rough), hematite, or obsidian/slag glass, but visually lacks the typical adamantine luster of gem-grade diamond.
Not a diamond; this specimen appears to be an unpolished or rough mineral crystal, possibly carbonado (black diamond rough), hematite, or obsidian/slag glass, but visually lacks the typical adamantine luster of gem-grade diamond. · Raw / Rough crystal
N/A (Uncut rough stone) Cut
Carat
N/A (Rough mineral specimen, not faceted)
Color
Opaque black / dark metallic
Clarity
N/A for opaque rough material
Shape
Raw / Rough crystal
Overall Assessment
The specimen shown is a dark, opaque, rough mineral crystal rather than a cut and polished diamond. Further testing (such as specific gravity, hardness testing, or Raman spectroscopy) is required to determine its exact mineral species.
Cut Quality
N/A (Uncut rough stone)
Brilliance
None (opaque specimen)
Fire
None
Scintillation
None
Proportions
N/A
Symmetry
Natural irregular crystal form
Polish
Unpolished natural surface showing striations and texture
Fluorescence
Cannot be determined visually without UV testing
Inclusions
Heavy natural mineral inclusions and internal fractures typical of rough stone
Blemishes
Natural surface pitting, striations, and roughness
Origin
Natural rough mineral, exact geological origin unknown from visual inspection alone.
Treatment Detection
No obvious signs of artificial treatments, appears as found in nature.
Estimated Value
Minimal as a gem, value depends entirely on mineral identification and collector appeal for rough specimens.
Certification Estimate
Requires professional laboratory testing (e.g., GIA or local gem lab) for positive identification.
Investment Potential
Low as an investment; mainly of interest to mineral collectors.
Similar Diamonds
None, as this does not resemble standard gem-quality diamond rough.
Setting Suggestions
Wire-wrapped rough stone jewelry or custom bezel setting if intended for ornamental use.
Care & Maintenance
Store separately from other gems to prevent scratching; clean gently with mild soap and water.
Interesting Facts
Rough mineral specimens often display natural growth lines and crystal faces that tell the geological history of their formation.