Chalcedony
Chalcedony is a microcrystalline form of silica that ranges from raw specimens to polished geodes and carved pieces, commonly collected as mineral specimens.
Fun Fact
Chalcedony is not a very expensive gemstone, with most pieces costing just a few dollars per carat at wholesale prices, making it one of the most affordable collectible minerals.
Price History
More in Nature
$31.8M
Fossil Tyrannosaurus Rex Skeleton (Stan)
Nearly complete T-Rex skeleton auctioned for research and display.
$5M
Moon Rock Sample (From Apollo 17 Mission)
Lunar basalt specimen collected during humanity's final Apollo mission in 1972.
$3.5M
Hope Diamond
A 45.52-carat deep blue diamond with a legendary curse.
$2.0M
Gold Bar (400 oz)
A standard 400 troy ounce gold bar, the kind stored in Fort Knox.