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Standard 40x photomicrographs of individual grains of sands sampled for testing as proppant for hydraulic fracturing for the 40/70 sieve size fraction. Photo courtesy of Stim-Lab, Inc. of Duncan, Okla.
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Standard 40x photomicrographs of individual grains of sands sampled for testing as proppant for hydraulic fracturing for the 40/70 sieve size fraction. Photo courtesy of Stim-Lab, Inc. of Duncan, Okla.