First, place the lighting fixture's broken arm into foam block to view if it fits properly against chandelier's base. You need to ensure that the broken edges meet perfectly. However, if they do not, adjust them for exact alignment.
The lead content of crystal doesn't indicate how fine it is. Some manufacturers often add lead to glass to make it softer and more malleable, and, because of the way lead interacts with light, it adds an excellent prismatic, shimmering effect.
If your crystals are very dirty you can also carefully wash them in a pan of sudsy water as long as you only use mild detergent. Although there are some commercial crystal cleaners on the market, Schonbek and other crystal chandelier manufacturers don't recommend using these because they could contain harsh chemicals that might degrade the crystals over time.
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