The art o technique of creating pictures or designs with solid materials on a board or something flat. "Mosaic is the one of the oldest decorative and pictorial arts and certainly one of the most durable".
The first step is choosing the glass you want to use to make the mosaic (any color or textures may be combined )
Cut a board of wood and paint it with gesso, an acrylic primer.
Draw the design that you want to make in the board with a pencil.
Cut the glass with a glass cutter depending the shape that you need for you design ( the glass has to be clean before you cut it so you don't dull the glass cutter ) .
Glue each glass piece in the board until you have got your design complete and let it dry.
Use tile grout to cover the holes between the glasses (with a knife spatula) and clean the mosaic with a sponge.