To make a vase with a broken mirror, you will use the techniques of mosaic making. Mosaics are designs made of small pieces of material, or tesserae. In this case the tesserae are the pieces of broken mirror. All mosaics require a base, and for this project the base must be something that can serve as a vase, such as a glass vase, a terra cotta vessel, a ceramic pitcher or a metal decanter. Any of these can serve nicely as a vase and as a viable base for a broken mirror mosaic.
Affix the broken pieces of mirror in a pattern or randomly over the entire surface of the base using acrylic based adhesive. Place two or three small drops of adhesive onto the back of each mirror piece. Wear safety glasses and gloves while handling the broken pieces of mirror.
Clip mirror pieces with glass cutters (also called glass nippers) to shape or trim them to fit into bare spots. Use glass cutters as you would wire cutters. Hold the pieces of broken mirror over a work table or dustbin while cutting them, and wear safety glasses and gloves.
Wait at least one hour for the adhesive on the vase to dry.
Spread a generous layer of grout onto a section of the broken mirror pieces.
Smooth the grout into the spaces between the pieces using a small trowel or putty knife. Wipe away any excess that remains on top of the broken mirror pieces with a damp cloth or rag.
Spread grout onto the adjoining section of mirror pieces, smooth it into the spaces between the pieces, and wipe away the excess. Repeat this procedure until the entire vase is grouted.
Wait at least 24 hours for the grout to dry before using your mirrored vase.
You may prefer to affix pieces of broken mirror to the vase base to form a shape or a line rather than covering the entire vase.