This type of glass is made by the arrangement, when cold, of glass tessere (tiles) and/or cross-sections of glass tubes of different colours and shapes in order to create the desired pattern.
After the small pieces of glass have been carefully selected and cleaned, they are arranged in a mould, made of a metal plate covered in a fire-resistant material, and the various empty spaces are filled with the fragments of glass.
This plate is then placed in the furnace until the tessere adhere to one another.
To complete the work, the plate is removed from the furnace and the hot glass is transferred to another pre-heated fire-resistant mould, which is then returned to the furnace so that the glass takes on the desired shape. The object is then finished by polishing and buffing.