Crystal glassware refers to high-quality glass that contains lead oxide, which enhances its clarity and brilliance. This type of glass is known for its ability to refract light, creating a sparkling effect that makes it popular for decorative items and fine dining. The manufacturing process of crystal glassware involves melting silica, lead oxide, and other materials at high temperatures. Once formed, it can be cut and etched into intricate designs, adding to its aesthetic appeal. Common items include wine glasses, decanters, and vases, often used for special occasions or as collectibles.