Imagine a crystal that changes color just by coming into contact with a pollutant, almost instantly revealing its presence. Scientists at Japan’s Shibaura Institute of Technology (SIT) have ...

And, "crystal" comes from a term (cristallo) coined by Italian glassmakers in the famous Murano glass-blowing center near Venice to define quality glassware which did not meet the European lead ...

The lead crystal glasses from the eastern German town of Arnstadt are exported to more than 50 countries worldwide. ... Bulky heavy colored glass, with a lot of polish.