It is a metamorphic rock composed of clay or volcanic ash, which has a minimum absorption coefficient which provides it with the optimal degree of water resistance for use on roofs and covers, also used in coatings of both façades and flooring.
It is a metamorphic rock of sedimentary origin, with high hardness and high quartz content. It is formed by recrystallization at high temperatures and pressure. It doesn’t experiment foliation.
Granilouro works with a multitude of different kinds of slate and quartzite from around the world, covering a wide range of colour and veining. These are the slates and quartzites of greater demand, the following images link to the technical characteristics of each material:
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