Selenite
Selenite is a transparent, crystalline variety of gypsum mineral often sold as small polished pieces, wands, or clusters for collectors and spiritual use.
Estimated value as of 2026 · Source: Average from common selenite tumbles, hearts, small spheres, and desert roses ac…
Fun Fact
Exceptional large selenite crystals from mines like Naica, Mexico can be worth hundreds to thousands of dollars for museum-quality specimens.
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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.