Roofing slates are roofing tiles made out of slate. The rock is split into thin sheets which are cut to the required size before shipment. This contrasts to slabs which are milled to produce larger structural components. They are the primary product of the slate industry.
In his writings, Pliny the Elder mentions the existence of slate in Liguria, near Genoa.
In 2012, Spain produced more than of slate worth about $380 million. This made it the largest slate producer in the world, followed by China and Brazil.
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