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Jet Stone: Mysteries & Histories
Jet stone is one unusual stone. Used as lapidary material for millennia, it gets no respect in mineralogical circles. Among ten common rock and...
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Yooperlites: What & Where to Find Them
Yooperlites: these fluorescent sodalite rocks are found along the shores of the Great Lakes and are especially popular in the Upper Peninsula of Michigan...
What are Herkimer Diamonds?
What are Herkimer diamonds? Nestled in the central New York Leatherstocking region made famous by 19th-century American writer James Fenimore Cooper in The Last...