The chalk Belgorodsky is a natural and pure chalk, which is mined in Russia's Belgorod region. Whole pieces of chalk are cut into neat columns. Characteristic signature is on every chalk of piece of - the groove of sawing. Just chalk this was in many schools of the Soviet Union, used as writing material for table. 100 % free of impurities and additives. BIO. A natural source of calcium to strengthen bones. The chalk Belgorodsky - snow-white, rein. Moderately hard, easily broken.