See how a stone sphere is made.
Click below for a PowerPoint presentation about echinoids.
A detailed video about making a stone sphere
Topics of Interest
An interesting video about meteorites
PBS Digital Studio has a YouTube channel called EONS. The first episode explores the evolution, diversity, and extinction of trilobites: click below
Watch mining for Amethyst in Uruguay
Related Rock, Mineral, Fossil, and Gem Websites
Click below to learn about rock tumbling.
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of Hernando County, Florida.
Montbrook Fossil Site Saber Tooth Cat
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