Crystal objects, from figurines to punch bowls, are highly prized for their enduring, multifaceted beauty and practical strength. When a crystal item is broken, cracked or chipped, owners might count it as ruined, a loss. It is, however, possible to repair damaged crystal, even at home, and while the result may not be as good as new, the item will be usable once more.
If the item is only cracked, simply apply the glass glue sparingly and let it dry in the sun. Glass glue is ultraviolet sensitive and dries stronger in the sun. The glue is very thin and seeps into the crack for an inconspicuous but strong repair. Do not try to use superglue or other thick adhesives which will be visible and rough to the touch when dry.
If the item is broken, lay the pieces out like a jigsaw puzzle, so that you can quickly place them together with the glue on the edges.
One by one, place the glue on the broken edges and carefully stick them together according to the directions on the glue package. It may be useful to have a helper to hold the pieces while you bond the edges.
Chips are harder to repair. The process involves grinding with felt wheels and pumice, and should typically be done by a professional glass restorer. Sometimes a tiny chip can be polished away very slowly with 600-grit sandpaper, but the surface will not be smooth and the shape may be affected.
You may be able to find the UV-sensitive glass glue at an auto parts store; otherwise it is available online.