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The quarrying of Luserna Stone has been documented since the mid-17th century. The material has been used for building purposes since ancient times, as well as for masonry work. The typical processing, still partly used today, consisted in splitting the block in slabs. Subsequently the blocks were squared in order for them to be used in road surfacing (pavement and driveway slabs, sidewalk curbs and dips), home building (balcony slabs, modillions, steps, risers, doorways, door and window jambs and architraves) and funerary décor. Since 17th century Luserna Stone has been used in high end construction. The best know examples of this are the outdoor pavements of the royal palaces of Torino, Racconigi and Venaria Reale. Lusierna stones were even employed in the slab roofing of Torino’s Mole Antonelliana, as required by architect Alessandro Antonelli. Still visible today are the many slabs at the time inserted among the brick rows, with the purpose of giving a higher solidity to the Mole, at that time the world’s highest brickwork construction. More generally, during the period between the two world wars, about 90% of Torino’s stairs and sidewalks were built in Luserna Stone. Since the end of the 1960s, the introduction of gangsawing and diamond disk sawing has deeply changed the manufacturing process. Compact and sound blocks, unfit for splitting, are now sawed into slabs. The blocks are subsequently flamed, smoothed and polished, or brushed to give them an aged look. The slab squaring and the curb processing are today completely carried out with mechanical and/or digital equipment and diamond tools. Other important works have been carried out both in Italy and in many European and extra-European countries, including United States, Canada, Japan, Thailand and Australia.

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maccagno vincenzo

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graniti sant'elena