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which measures 4
a hollow brick that lined the walls of the thermae
in the Carboniferous Period
and the surface has been hand-polished to enhance the natural structure of the fossil
Pyrite Cluster - 2.401" rockinaboxspaceshuttle which measures 4Better known as Fool's Gold, pyrite is an iron sulfide compound with a gold like appearance, hence its nickname. Unlike gold however, pyrite often forms in cubic crystals, an expression of the mineral's cube shaped atomic structure. This specimen is a pyrite cluster measuring 2. 401". It might not be worth its weight in gold, but this mineral has been valued since prehistory when pyrite was used as a fire starter by Neanderthals and our other human
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