Fossil Fern
A Fossil Fern is a preserved fossilized leaf or frond from ancient ferns, typically from the Carboniferous period, sold as collectible specimens in sizes around 1-2 inches for display.
Estimated value as of 2026 · Source: FossilShack and multiple fossil retailers (e.g., Fossilicious, Root Rot Nature S…
Fun Fact
These fossils often originate from Mazon Creek, Illinois, dating back 300 million years and preserving remarkably detailed plant structures in ironstone nodules.
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Californium-252 (per gram)
Californium-252 is a synthetic radioactive element produced in nuclear reactors, valued as an exceptional neutron source for medical and industrial applications.
Dog Collar
A dog collar is a band worn around a dog's neck, typically made of nylon or leather, used for identification, control, and attaching leashes.
Fossil Tyrannosaurus Rex Skeleton (Stan)
Nearly complete T-Rex skeleton auctioned for research and display.
Moon Rock Sample (From Apollo 17 Mission)
Lunar basalt specimen collected during humanity's final Apollo mission in 1972.