Not a diamond; appears to be a rough quartz pebble, quartzite, or similar silicate mineral with iron staining.
Not a diamond; appears to be a rough quartz pebble, quartzite, or similar silicate mineral with iron staining. · Irregular, water-worn pebble or cobble (uncut rough).
Not Applicable (Rough, uncut, unpolished natural stone). Cut
Carat
Estimated around 15-25 carats based on volumetric appearance, though mineral composition is non-diamond.
Color
Brownish-white to yellowish-brown with iron oxide staining (not applicable to standard D-Z diamond scale).
Clarity
Included / Heavily fractured (Not applicable to gem-grade diamonds; contains visible internal fractures and surface matrix).
Shape
Irregular, water-worn pebble or cobble (uncut rough).
Overall Assessment
The specimen shown in the image is a rough, water-worn pebble of quartz or quartzite with surface staining rather than a diamond. It lacks the crystal habit, high refractive index, and adamantine luster characteristic of rough diamonds.
Cut Quality
Not Applicable (Rough, uncut, unpolished natural stone).
Brilliance
Poor to None (vitreous luster on broken surfaces, but lacks optical properties of a diamond).
Fire
None (quartz and related minerals lack high dispersion).
Scintillation
None due to lack of faceting and transparency.
Proportions
Not Applicable (non-faceted rough stone).
Symmetry
Asymmetrical, naturally tumbled or weathered shape.
Polish
Unpolished, matte texture with natural weathering and surface pitting.
Fluorescence
Unknown (requires UV testing; typical quartz may show weak blue or inert responses).
Inclusions
Extensive internal micro-fractures, mineral inclusions, and iron oxide staining along fissures.
Blemishes
Surface pits, abrasions, and adhering dirt/sediment from the environment.
Origin
Alluvial deposit, riverbed, or weathered soil deposit (rough quartz or quartzite pebble).
Treatment Detection
Untreated natural mineral specimen.
Estimated Value
Nominal / Minimal geological specimen value (essentially negligible market value).
Certification Estimate
Not certifiable as a gemstone by major diamond grading laboratories (GIA, AGS, IGI).
Investment Potential
None as an investment; educational or mineral collecting interest only.
Similar Diamonds
None; this specimen is fundamentally different in mineral composition from diamond.
Setting Suggestions
Not recommended for fine jewelry settings in its current rough, low-value state.
Care & Maintenance
Standard washing with mild soap and water to remove dirt and surface debris.
Interesting Facts
Many translucent to transparent river pebbles are mistaken for rough diamonds by finders due to shape and location, but hardness testing (Mohs scale) easily differentiates quartz (7) from diamond (10).