The DURAN Group is one of the world's leading manufacturers of borosilicate glass, a special glass invented by Otto Schott in 1887 and registered in 1938 under the trade name DURAN®. With sites in Mainz (DURAN Produktions GmbH & Co. KG), Wertheim (DURAN Group GmbH) and Pula (DURAN d.d.), the DURAN Group has a complete value chain from the glass melting process right through to glass forming and processing. DURAN Group. Magic of precision.