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aragonite - "cave calcite" - El Potosi Mine, Santa Eulalia Mining District, Chihuahua - large hand/display specimen
$ 20.00
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chert - banded chert from the Monterey Formation, California - large hand/display specimen
$ 20.00
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kernite - hydrated sodium borate, an uncommon borate mineral
$ 7.50
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limonite - teaching hand specimen of limonite from the Whiteside mine
$ 7.50
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magnesite - teaching hand specimen of very light gray to white earthy magnesium carbonate from the Kramer Hills
$ 7.50
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magnesite - white vitreous magnesite - teaching hand specimen
$ 7.50
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magnetite - teaching student specimens of this important iron ore - unit of 10 smaller specimens
$ 5.80
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psilomelane - botryoidal psilomelane from Morocco - teaching hand/display specimen
$ 12.50
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