Not a diamond; this specimen appears to be rough, unpolished glass slag or quartz crystal, lacking the specific crystal habit and refractive properties of a true diamond.
Not a diamond; this specimen appears to be rough, unpolished glass slag or quartz crystal, lacking the specific crystal habit and refractive properties of a true diamond. · Raw, uncut, irregular elongated crystal or glass chunk
Not applicable (raw, unfaceted rough material) Cut
Carat
Cannot be reliably determined visually from this angle, estimated roughly at 15-25 carats based on volume if quartz or glass.
Color
Light greenish-blue or pale aqua tint
Clarity
Included / heavily included (SI2 equivalent if it were gem material, showing numerous bubbles and inclusions)
Shape
Raw, uncut, irregular elongated crystal or glass chunk
Overall Assessment
The specimen shown in the image is definitively not a diamond. It lacks the crystal structure, high refractive index, and adamantine luster of diamond, instead presenting characteristics consistent with industrial glass slag or low-grade raw quartz.
Cut Quality
Not applicable (raw, unfaceted rough material)
Brilliance
Low to moderate, typical of unpolished transparent material
Fire
Negligible to minimal dispersion
Scintillation
Poor, lacking precise facet arrangements to return sparkling light patterns
Proportions
Irregular elongated shard, no standardized pavilion, table, or crown measurements apply
Symmetry
Asymmetrical, natural or fractured rough formation
Polish
Raw, unpolished surfaces with natural conchoidal fractures visible
Fluorescence
Unable to determine without UV testing
Inclusions
Abundant internal gas bubbles, striations, and particulate inclusions characteristic of glass or lower-grade rough mineral
Blemishes
Surface scratches, chips, and irregular fracture planes
Origin
Likely manufactured industrial byproduct (slag glass) or natural quartz
Treatment Detection
No apparent enhancements, standard natural or manufactured state
Estimated Value
Nominal value as decorative mineral specimen or industrial glass scrap (under $10)
Certification Estimate
Standard gemological laboratories (GIA, AGS) would not certify this as a diamond; it would be identified simply as glass or quartz rough
Investment Potential
None; holds zero resale or investment value as a gemstone
Similar Diamonds
None, as this is visually confirmed not to be a diamond
Setting Suggestions
Not recommended for fine jewelry settings due to low hardness (if glass) and lack of gem-quality structure
Care & Maintenance
Handle with care to avoid sharp edges; clean with mild soap and water if kept as a mineral specimen
Interesting Facts
Many inexperienced collectors mistake slag glass or raw quartz crystals for rough diamonds due to their translucent appearance and irregular shapes.