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Commercially, marble is any crystalline rock
composed predominantly of calcite, dolomite or serpentine,
having 3-4 hardness, which can be excavated as blocks and
can be sawn into marble slabs and marble tiles. Marble is
used for wall cladding, roofing and flooring and a variety
of other interior and exterior applications.
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Slate is a fine-grained,
foliated, homogeneous, metamorphic rock. Slate can be made
into roofing slates, also called roofing shingles. Slate
tiles are often used for interior and exterior flooring or
wall cladding. Tiles are installed and set on mortar and
grouted along the edges.
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