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gneiss - hand/display specimen of a Proterozoic granite gneiss
$ 12.50
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gneiss - Proterozoic granitic gneiss from the San Gabriel Mountains, California - hand specimen
$ 9.50
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hematite - thick slab of crystalline hematite from the BBC Mine, La Paz County, Arizona
$ 30.00
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magnesite - teaching student specimens of light tan porous magnesite from the Windous Butte magnesite deposit, Nevada - unit of 5 student specimens
$ 4.20
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