Siliceous rocks are used in a variety of industrial applications. For example, vermiculite can be used as grinding raw material and siliceous refractory material because of its high hardness; jasper is also made of fine stone with hard and compact color and beautiful color. Diatomaceous earth has a wide range of uses in various sectors such as the chemical industry, the sugar industry and the water purification industry due to its strong adsorption. Volcanic activity increases the siliceous content of the ocean and is the main source of silicon in siliceous rocks.
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