Non-Diamond (Common Chalcedony/Carnelian Agate)
Non-Diamond (Common Chalcedony/Carnelian Agate) · Natural Asymmetric / Tumbled Pebble
Poor (Not a faceted gemstone cut) Cut
Carat
Estimated 15-25 carats (based on size relative to carpet fibers)
Color
Opaque Reddish-Orange and Creamy White (Banded)
Clarity
Opaque (Does not meet diamond clarity scales)
Shape
Natural Asymmetric / Tumbled Pebble
Overall Assessment
This object is not a diamond. It is a tumbled piece of Carnelian Agate, a variety of chalcedony. It lacks the refractive index, crystal structure, and hardness of a diamond.
Cut Quality
Poor (Not a faceted gemstone cut)
Brilliance
None (Opaque material)
Fire
None
Scintillation
None
Proportions
Not applicable (Non-faceted, irregular tumbling)
Symmetry
Poor / Natural Asymmetric
Polish
Fair (Waxy to Vitreous luster from tumbling)
Fluorescence
None observed
Inclusions
Internal banding, color zoning, and micro-crystalline structures typical of quartz/agate
Blemishes
Visible pockmarks, surface pits, and organic weathering
Origin
Natural, likely riverbed or coastal origin; common in volcanic regions
Treatment Detection
Possibly heat-treated to enhance red tones (common for carnelian)
Estimated Value
$1 - $5 USD (Common decorative stone)
Certification Estimate
Not eligible for diamond grading; would be identified as Carnelian Agate by GIA Gem Identification labs
Investment Potential
None (Decorative only)
Similar Diamonds
None (This is a silica-based mineral, not carbon-based)
Setting Suggestions
Wire wrap or cabochon bezel setting for casual jewelry
Care & Maintenance
Avoid harsh chemicals; ultrasonic cleaners are generally safe but mild soap and water is preferred
Interesting Facts
Carnelian was highly prized in ancient Rome and Egypt for signet rings and amulets due to its durability and color