The glass used in Renaissance Glass's jewelry is called dichroic glass. The glass was first developed for scientific applications such as lasers and space mirrors. Vaporized metal oxides are deposited on the glass in microscopically thin layers. The brilliant colors are produced from light being reflected just like what occurs in a rainbow or a dragonfly wing.
Each piece is handled many times and there is no machine that can make their glass. The glass is fired to over 1400 degrees several times in order to achieve the right effect. Each firing can take up to 12 hours from start to finish. When the sheet of glass is cool enough, they cut the shapes with diamond tools, polish the glass, match the earrings by the patterns they see, and complete the design. It's a lot of steps and we do it by hand, but the results are worth it. It's like capturing lightning in a bottle and every time we open the kiln it's a new surprise