Inclusions are materials that are held between layers of glass during the glass fusing process, these materials add design and texture elements to art glass jewelry items.
The materials must be thin and weak so that the glass can expand and shrink normally in the glass fusing kiln. If the included object is too thick the glass may crack or bulge as it cools.
Metal or an organic material may be used as an inclusion for a fused glass project. Each of these materials requires a different fusing approach.