$100 million frac sand mine being developed near San Antonio as demand soars

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Frac sand” is a high-purity quartz sand with very durable and very round grains. It is a crush-resistant material produced for use by the petroleum industry.

As demand for frac sand continues to climb, Pennsylvania-based Preferred Sands LLC is the latest player to set up shop among a growing number of mines just south of San Antonio.

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