Part of the extracted stone, selected according to its chemical composition and granulometry, is calcinated at about 1000°C in different types of kiln, fired by such fuels as natural gas, coal, fuel oil, lignite, etc..

The CO2 of the stone is released to produce calcined dolomitic lime or quicklime (CaO.MgO or CaO respectively).

According to the reaction: 

 quicklime is produced.

The pebble-lime thus produced is screened, crushed or ground and stored according to the characteristics demanded by the customers.