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Marble
Marble is a metamorphic rock resulting from the metamorphism of
limestone, composed mostly of calcite (a crystalline form of
calcium carbonate, CaCO3). It is extensively used for sculpture,
as a building material, and in many other applications. The word
'marble' is colloquially used to refer to many other stones that
are capable of taking a high polish
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Sandstone
Sandstone is a sedimentary rock composed mainly of sand-size
mineral or rock grains. Most sandstone is composed of quartz
and/or feldspar because these are the most common minerals in
earth's crust. Like sand, sandstone may be any color, but the
most common colors are tan, brown, yellow, red, gray and white.
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Granite
Granites are usually a white, black or buff color and are medium
to coarse grained, occasionally with some individual crystals
larger than the groundmass forming a rock known as porphyry.
Granites can be pink to dark gray or even black, depending on
their chemistry and mineralogy. Outcrops of granite tend to form
tars, rounded massifs, and terrains of rounded boulders cropping
out of flat, sandy soils.
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Slate
Slate is a fine-grained, homogeneous, metamorphic rock derived
from an original shale-type sedimentary rock composed of clay or
volcanic ash through low grade regional metamorphism. The result
is a foliated rock in which the foliation may not correspond to
the original sedimentary layering.
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Limestone
Limestone is a sedimentary rock composed largely of the mineral
calcite (calcium carbonate: CaCO3). Limestone often contain
variable amounts of silica in the form of cert or flint, as
well as varying amounts of clay, silt and sand as
disseminations, nodules, or layers within the rock.
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Mosaic
Mosaic is the art of decoration with small pieces of colored
glass, stone or other material. It may be a technique of
decorative art, an aspect of interior decoration or of cultural
significance as in a cathedral. Small tiles or fragments of
pottery (known as teaser, diminutive tessellate) or of colored
glass or clear glass backed with metal foils, are used to create
a pattern or picture.
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Handicrafts
Stone carving is an ancient activity where pieces of rough
natural stone are shaped by the controlled removal of stone.
Owing to the permanence of the material, evidence can be found
that even the earliest societies indulged in some form of stone
work.
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