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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 - cleavage plate from a pegmatite near Cardiff, Ontario - hand specimen
$ 9.50
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conglomerate - hand/display specimen of conglomeratic limestone from the Brian Head Formation
$ 12.50
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fault gouge - clay formed in the San Andreas fault zone - Unit of 5 student specimens
$ 4.20
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