The glassmakers and blowers who are active in Colle are proud of their work and see themselves as safe keepers of ancient traditions and consider theirs to be a key place for the ancient art of cut glass and crystal production. The distinction between glass and crystal lies in the presence of lead oxide in the latter; its effect increases the density of the glass. In other words: when glass hits crystal, light is refracted in a stronger manner than with regular glass, giving different effects that are typical of crystal.
Businesses involved in this initiative include:
1. Boreno Cigni - Vicolo delle Fontanelle, 53034 Colle di Val d'Elsa (SI)
2. Cristalleria La moleria Gelli - Via delle Romite 26-28, 53034 Colle di Val d'Elsa SI Engravings, carvings and grinding
3. La Grotta del Cristallo - Zona industriale, lotto n°8, 53034 Belvedere Colle di Val d'Elsa SI Grinding, engravings, and hand carved crystal
4. Collevilca Cristalleria - Strada Comunale, Località S. Marziale, 24, 53034 Colle di Val D'Elsa SI