| 21. | The sanded variety contains finely ground silica sand; unsanded is finer and produces a non-gritty final surface.
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| 22. | This sand is simply silica sand with only a small amount of binder and no special additives.
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| 23. | The most common aggregate is silica sand.
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| 24. | Silica sand is used to make glass.
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| 25. | Domestic mining production supplies an important quantity of some nonmetals : silica sand, pyrophyllite clay, dolomite, and limestone.
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| 26. | Many of these have direct commercial uses, such as clays, silica sand and most kinds of building stone.
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| 27. | Mineral deposits include bauxite, antimony, white limestone, clay, peat and silica sand which is used to manufacture glass.
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| 28. | "Fused quartz " is produced by fusing ( melting ) high-purity silica sand, which consists of quartz crystals.
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| 29. | Silica sand, a fine white sand used in making glass, is mined in the vicinity of Troy Grove.
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| 30. | The silica sand was used to make glass, most popular for canning jars, ketchup bottles and drinking glasses.
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