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汉白玉是一种主要成分是碳酸钙的化合物。颜色洁白的细粒大理岩，质坚硬，是上等的建筑和雕刻材料。基本上它并不溶于水。它可存在于以下形态：霰石、方解石、白垩、石灰岩、大理石、石灰华。可于岩石内找到。动物背壳和蜗牛壳的主要成份。同时，它还是重要的建筑材料。
White marble is a kind of compound whose main component is calcium carbonate. The fine-grained marble with white color and hard texture is the best building and carving material. It's basically insoluble in water. It can exist in the following forms: aragonite, calcite, chalk, limestone, marble, travertine. It can be found in the rock. The main components of animal shell and snail shell. At the same time, it is also an important building material.