Klaus-Peter is Martinek is Graduate Mineralogist . He was, until January 2008, Head of the Research and Development Department at Nachtmann Bleikristallwerke GmbH, Neustadt/Waldnaab, Germany.
An exquisite beverage deserves a high-quality glass. Even the ancient Romans made artistically crafted drinking glasses. In the Middle Ages, Venetian glassmakers were famous for the purity of their…