Butterfly. 4" x 3" (102 x 76mm). Colour de Verre produces reusable glass-casting molds for artists and hobbyists. This company has merged the age-old art of glass casting with modern technology and contemporary design. Colour de Verre molds can be filled with glass powders, pate de verre, glass frit or cut sheet glass. Packaged with instructions, they are easy to use and produce beautiful results. Another great product developed by Jayne Persico.