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Rocks under the Microscope - Index Sandstone (with mica) A fairly fine-grained sandstone made of rather angular grains of quartz and feldspar (feldspar looks more cloudy). Narrow flakes of mica, seen edge-on, and slightly crumpled, lie on bedding planes. Marble - Wikipedia Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite.Marble is typically not foliated, although there are exceptions.In geology, the term "marble" refers to metamorphosed limestone, but its use in stonemasonry more broadly encompasses unmetamorphosed limestone. Marble is . crusher of lime stone waste marble quarry management Zenith produces the high quality equipments to meet different customers such as quarry cruher,quarry crusher,sand making mahcine,cone crusher, impact crusher, vertical rolelr ... - We are offering mosaic stones, stone mosaic, marble stones, natural mosaic, sandstone stones, natural stones granite, Stone wall panels, Stone murals, natural ...    Read More