Not a diamond; appears to be industrial slag glass, quartz, or another amorphous silicate material showing conchoidal fracture.
Not a diamond; appears to be industrial slag glass, quartz, or another amorphous silicate material showing conchoidal fracture. · Irregular raw crystal / fragment with conchoidal fracture surfaces
Not applicable (uncut raw fragment) Cut
Carat
Not applicable as this is not a gemstone-quality diamond; weight cannot be accurately estimated visually without specific density testing.
Color
Colorless / Transparent
Clarity
Not applicable (contains internal flow lines, bubbles, and stress fractures typical of glass or quartz rather than diamond inclusions)
Shape
Irregular raw crystal / fragment with conchoidal fracture surfaces
Overall Assessment
The specimen shown in the image is definitively not a diamond. It displays conchoidal fractures, flow lines, and surface characteristics that strongly indicate industrial glass or quartz rather than crystallized carbon.
Cut Quality
Not applicable (uncut raw fragment)
Brilliance
Poor to fair vitreous luster, not possessing diamond adamantine luster
Fire
Minimal dispersion, far below the fire of a genuine diamond
Scintillation
Poor, lacks standard facets required for structured scintillation
Proportions
Not applicable
Symmetry
Asymmetrical raw fragment
Polish
Raw fractured surfaces, unpolished
Fluorescence
Unknown without UV testing
Inclusions
Internal flow lines, possible gas bubbles, and stress fractures
Blemishes
Conchoidal fracture ripples and surface striations
Origin
Synthetic industrial waste (slag) or natural quartz
Treatment Detection
None detected, material is what it is (likely man-made glass or natural quartz)
Estimated Value
Nominal / negligible decorative or collector value (less than $10)
Certification Estimate
Cannot be certified as a diamond; gemological laboratories (such as GIA) would issue a report identifying it as glass or quartz.
Investment Potential
None
Similar Diamonds
None, as this material is fundamentally different from diamond in chemical composition and crystal structure.
Setting Suggestions
Not recommended for jewelry due to low hardness and durability compared to diamond
Care & Maintenance
Standard gentle cleaning with mild soap and warm water if kept as a mineral specimen
Interesting Facts
The smooth, curved fracture patterns visible on the surface are called conchoidal fractures, which are characteristic of brittle amorphous materials like glass and quartz.