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KingStone has been operating in the field of extraction, processing and sale of natural stones for four generations,
a culture since 1870 handed down by tradition of expert stonemasons and quarrymen.
Over the years, the family has been involved in the cultivation and recovery of various marble and travertine quarries, in Italy and abroad.
A first pink marble quarry was cultivated by the family in the 1950s on the slopes of Mount Soratte.
Our products 
The travertine advantages
Unalterable beauty
HYGIENIC
SURFACE
The low porosity and high density of this stone makes it resistant to the production of mold, fungi and bacteria. Fully compatible with food
UNALTERABLE
COLOR
It is resistant to UV radiation and always maintains the same color as on the first day.
STAINS
RESISTANCE
The low porosity makes this material resistant to stains, with anti-graffiti properties.
Simple CARE
AND MAINTENANCE
It does not require special cleaning products.
FIRE AND HEAT
RESISTANT
The Travertine surface is resistant to high temperatures.
Cava Grassano
Extraction stages
1st PHASE
The first phase consists in making the horizontal cut on the mountain. The protagonist of this process is the chain saw, an innovative machine on rails, which makes precise cuts in the rock penetrating like the blade of a knife.
2ND PHASE
The second phase consists in the vertical cut to the mountain and with which a portion of rock called ‘bank’ is separated from the marble mass by using the diamond wire machine.
3rd PHASE
The third phase consists in squaring the blocks: the bank by now overturned is divided into portions by using the diamond wire machine.
Processing steps
Segagione
Taglio
Finitura
Imballo
Deposito
Safety 
L’azienda opera nel rispetto di tutte le norme cogenti e di buona prassi. Significativo è il grado di attenzione verso le maestranze impiegate per le quali si perseguono obiettivi di massima sicurezza e di comfort. L’azienda applica con rigore i disposti del D.lgs 624/96, del D.P.R. 128/59 e del D.lgs. n. 81/2008. Rappresentativo è il rispetto della norma BS OHSAS 18001:1999, standard internazionale per la gestione della sicurezza e salute dei lavoratori.
Environment 
Kingtone has always considered fundamental, in carrying out its production and extraction activities, the needs of respect for the environment and in particular that of landscape protection aimed at restoring and preserving the quality of the territory.
The company adopts the innovative cultivation system “by sectors”, whereby the recovery of the area takes place at the same time as the extraction works. The quarry area of the cultivated sector is returned to its agricultural purpose already during the cultivation of the next sector.
Before the start of cultivation, the soils are subjected to geochemical analyzes in order to identify the “0” point not to be altered. Furthermore, in compliance with international environmental protection standards, all the guidelines of the UNI EN ISO 14001: 2015 standard are adopted.
Featured projects
Matera Railway
