Pseudo-fossil (River-worn Cobble)
Inorganic clast; likely Quartzite or fine-grained Sandstone • Non-fossil / Geofact; Water-worn sedimentary or metamorphic rock
Geological Period
Indeterminate; potentially Proterozoic to Cenozoic depending on source bedrock
Estimated Age
Unknown; can range from 10,000 to over 500 million years
Preservation Type
None (Inorganic rock); smooth surface achieved through fluvial or glacial abrasion
Condition Assessment
Excellent (as a rock); shows natural weathering and smooth abrasion with no fractures
Taxonomic Classification
Non-biological; Mineralogical: Silicate-based rock
Morphological Description
Oval, discoidal shape with a smooth, matte surface texture. Exhibits uniform grain distribution with absence of biological symmetry, internal septa, or growth bands.
Rock Matrix
Self-contained clast; likely quartz sand cemented by silica or heat/pressure
Formation & Location
Widespread across global riverbeds, beaches, and glacial till deposits
Size & Dimensions
Approximately 6-8 cm in length; typical for mid-sized river cobbles
Value & Rarity
Estimated Market Value
Minimal to $0 USD
Auction Estimate
N/A; typically sold in bulk as decorative landscape stone
Rarity Assessment
Extremely Common; billions of similar specimens exist in geological contexts
Scientific Significance
Low paleontological value; useful for sedimentological study of transport distance and energy of depositional environments
Preparation Recommendations
No preparation required; may be washed with soap and water for display as a tactile object
Notable Features
Often mistaken for fossil eggs or bivalve molds due to its symmetrical, rounded shape caused by mechanical erosion.