Not a diamond; this appears to be a natural mineral specimen, likely volcanic glass (obsidian) or a dark industrial slag with conchoidal fractures.
Not a diamond; this appears to be a natural mineral specimen, likely volcanic glass (obsidian) or a dark industrial slag with conchoidal fractures. · Rough uncut nodule / Irregular raw mass
Not applicable (uncut raw material) Cut
Carat
Cannot be accurately determined without exact dimensions and density testing; visually substantial rough piece.
Color
Opaque dark grey to black body color
Clarity
Not applicable; contains internal fractures and inclusions typical of raw glass/silica or slag.
Shape
Rough uncut nodule / Irregular raw mass
Overall Assessment
This specimen is decisively not a diamond. It exhibits characteristic conchoidal fracturing and texture indicative of volcanic glass or slag rather than crystallized carbon.
Cut Quality
Not applicable (uncut raw material)
Brilliance
Low to none; vitreous to dull luster depending on the fracture surface
Fire
None
Scintillation
None
Proportions
Irregular raw specimen with no standard optical proportions
Symmetry
Asymmetrical raw formation
Polish
Rough/Unpolished exterior with conchoidal fracture surfaces
Fluorescence
Unknown without UV testing
Inclusions
Abundant internal stress cracks, gas bubbles, and potential mineral impurities typical of volcanic or industrial material
Blemishes
Natural surface pitting, rough patches, and conchoidal chipping
Origin
Likely natural volcanic origin (obsidian) or industrial byproduct
Treatment Detection
None detected; appears to be in its raw, natural state
Estimated Value
Nominal value as a mineral specimen or raw material (low commercial value)
Certification Estimate
Not gradable by major diamond grading laboratories (GIA, AGS, IGI). Requires geological or material testing.
Investment Potential
None; purely decorative or educational as a rock/mineral sample
Similar Diamonds
None (this is not a diamond)
Setting Suggestions
Not suitable for standard fine jewelry due to lack of hardness and durability; could be wire-wrapped as a raw specimen piece.
Care & Maintenance
Handle with care to prevent chipping along conchoidal fracture lines; clean with mild soap and water.
Interesting Facts
Obsidian forms when felsic lava extruded from a volcano cools rapidly with minimal crystal growth.