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anthracite - metamorphic "hard coal" from eastern Pennsylvania - unit of 5 student specimens
$ 4.20
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asbestos - tremolite (amphibole) asbestos - teaching hand specimen of fibers in a screw-cap pyrex tube
$ 10.50
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biotite - hand specimen from a pegmatite near Cardiff, Ontario
$ 9.50
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calcite - teaching hand specimen of naturally-brown calcite
$ 7.50
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camptonite - hand/display specimen of a very unusual lamprophyre
$ 12.50
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chalcopyrite - teaching student specimens from a mineralized vein - Unit of 10 smaller specimens
$ 12.50
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dacite - teaching hand specimen of gray porphyritic dacite
$ 9.50
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