A very pretty example of purple yttrofluorite on calcite, from the Dachang Pollymetalic Orefied.  There has been quite a bit of this material around, but I always run into three problems-- it is either too damaged, too dark, or too light. The yttrofluorite on this one has a pleasant lavender color, and is sprinkled over a nice arrangement of calcite crystals. A couple of the tips are missing!