Wissmach opalescent, streaky and wispy stained glass is art glass manufactured by The Paul Wissmach Glass Company. This art glass is used by stained glass and mosaic glass artists and hobbyists to create stained glass and mosaic glass art. Textures include Smooth, Granite and more. Opalescent glass is made with a combination of white glass and a cathedral color. Streaky glass is made by adding one or more colors to a clear glass base. Wispy glass is made by mixing an opaque white glass with a cathedral color.