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石材是取自礦山的岩石經人工加工而成。岩石是由各種礦物組成。所謂礦物，就是地殼中的各種化學元素經過各種地質作用所形成相對穩定的自然產物。Stone was taken from the mines of rocks formed by manual processing. Rocks are made up of various minerals. So-called minerals is the various chemical elements through a variety of geological processes in the Earth's crust formed by the relatively stable nature of product.
板岩（Slate）是由黏土岩、沉積葉岩（有時由石英石）形成的變質岩。Slate (Slate) is made up of clay and sedimentary shale (sometimes quartz), formed of metamorphic rocks.
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