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What is Slate?

Slate Stone
Slate Stone or simply slate is compact metamorphic rock, composed primarily of silica and alumina. Slate is easy to clean, requires very little maintenance and also provides high slip resistance & is long lasting. Slate tiles and slate slabs are suitable for exterior and interior applications such as wall-cladding, roofing, flooring, hearths, fireplaces, kitchen, landscaping, driveways, pools, etc. Natural slate stone is known by many names such as grey slates, flags, flagstones, thick stones, slats, flat stones, stone tiles and tile stones, as it imparts a majestic and spectacular look on the buildings. Natural slate is available in a variety of colors such as black slate, blue slate, red slate, grey slate, green slate, etc.
Slate Finishes : Naturally non-slip surface can be rubbed plain or finished with clear varnish after fixing.
Slate Uses : Wall-cladding, roofing, flooring and all other types of interior & exterior applications depending upon the imagination of an architect.

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.|

Chemical composition
Slate is mainly composed of quartz and muscovite or illite, often along with biotite, chlorite, hematite, and pyrite along with, less frequently, apatite, graphite, kaolin, magnetite, tourmaline, or zircon as well as feldspar. Occasionally, as in the purple slates of North Wales, ferrous reduction spheres form around iron nucelei, leaving a light green spotted texture - the spheres sometimes deformed by a subsequent applied stress field to ovoids, which appear as ellipses when viewed on a cleavage plane of the specimen.
m-green
sanjani-autumn
 silver-gray
n-green jak-black-natural zeera-green
tera-red kund-black-natural silver-shine
lime-pink deoli-green-natural lilac-natural
lime-green indian-autumn-rustic jak-multicolor-slates
copper-red indian-utumn-natural mahu-multicolor-slates
ocean-green akbarpur-pink-slates kund-multicolor-natural
shimla-white peacocok-multi-blowup california-gold-natural
Uses of slate
Slate can be made into roofing slates, also called roofing shingles, because it has two lines of breakability: cleavage and grain. This makes it possible to split slate into thin sheets. Fine slate can also be used as a whetstone to hone knives. Because of its thermal stability and chemical inertness, slate has been used for laboratory bench tops and for billiard table tops. In 18th and 19th century schools, slate was extensively used for blackboards and individual writing slates for which slate pencils were used.

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. Chemical sealants are often used on tiles to improve durability and appearance, increase stain resistance, reduce efflorence, and increase or reduce surface smoothness. Tiles are often sold gauged, meaning that the back surface is ground for ease of installation.

Slate is often used as a decor in freshwater aquariums. Slate will not alter the chemistry of water {except in the slate containing feldspar which may leech silicates into the water resulting in excess diatom growth in marine aquaria). When broken, slate produces a natural appearance while remaining relatively flat and can be easily stacked. Silicon glue adheres to slate, creating a non-toxic bond to secure it. It is also used in stairs and pathways for the same reasons.
Traditional Go equipment uses slate for the black pieces.
Slate extraction
Slate-producing regions include Cornwall (famously the town of Delabole) and Wales in the United Kingdom (see slate industry in Wales), Liguria in northern Italy especially between the town of Lavagna (which means chalkboard in italian) and Fontanabuona valley, Portugal especially around Valongo in the north of the country, Germany (Moselle River-region, Hunsrück, Eifel, Westerwald, Thuringia, north-Bavaria), Alta, Norway, Galicia, Brazil around Papagaio in Minas Gerais, the east coast of Newfoundland, the Slate Belt of Eastern Pennsylvania, and the Slate Valley of Vermont and New York. Granville, New York, of the Slate Valley claims to be the colored slate capital of the world.

Slate is also found in the Arctic and was used by the Inuit to make the blades for ulus. China has vast slate deposits; in recent years its export of finished and unfinished slate has increased.
 
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slate natural stone, stone slate flooring.