SODIC FELDSPAR - MINE OF "SERRA MAJORE" - LOCULI Typical the filoniane manifestations acide to prevailing feldspatic composition of area of the Baronies (Sardinia North-oriental) genetically are associated to the leuco-granite that they represent last phase of interference of the Sardinian batholith; such manifestations acide have endured processes of more or less marked albitization as a result of tectonic and metamorphic phenomena of low degree. The giacimento of Serra Majore is set up in an important locality of albiting vein pegmatics and it's deep-set between leucogranite and the palaeozoic metamorphic base. About mineralogy the layer is constituted from plagioclase essentially albitic (80%), microcline (7 %), quartz (5%, chlorite (6%) and sometimes accessories which zircon and titanite. The giacimento is cultivated to sky opened using explosive and mechanical means, it's crushed and reduced in flour mill to hammerings to the granulometrie 0-8 milimeter trades them. The production has been addressed exclusively to the field of the monobaking but it is previewed starting of a new system of comminution and deferrization for the Sodic Feldspar production destined exclusively to use in the porcelain Gres.