Not a fossil; Igneous volcanic rock (Scoria / Pumice)
Not applicable (Geological specimen) • Not a fossil; geological rock specimen (Igneous rock)
Geological Period
Modern / Variable (Volcanic origin, not restricted to a specific fossiliferous period)
Estimated Age
Variable (Recent to ancient volcanic activity, 0 to millions of years)
Preservation Type
Not applicable (Igneous rock formation, not fossilized organic material)
Condition Assessment
Not applicable for fossils; standard weathered geological hand specimen
Taxonomic Classification
Not applicable (Inorganic geological specimen)
Morphological Description
Dark, vesicular, highly porous texture characteristic of rapidly cooling gas-rich volcanic lava such as scoria or basaltic pumice
Rock Matrix
Vesicular volcanic rock matrix composed of silicate minerals and glass
Formation & Location
Volcanic regions worldwide, typically associated with Strombolian eruptions or basaltic flows
Size & Dimensions
Approximately 3 cm to 5 cm in length, typical for small hand specimens
Value & Rarity
Estimated Market Value
Minimal to zero ($0 - $5 as a common educational rock specimen)
Auction Estimate
Not applicable
Rarity Assessment
Common globally
Scientific Significance
Illustrates volcanic processes, degassing, and igneous petrology rather than paleontological history
Preparation Recommendations
No preparation needed; store in a dry environment
Notable Features
Distinct vesicular texture with numerous gas cavities (vesicles) formed by escaping volcanic gases