. . "o's look like the manmade zircon than i see in the vug special fakes minerals.he is been very hard to find than the crystals was glue to the matrix cause they really do a great job.i never check if the glue was fluorescent but i think they use a kind of epoxy cause the glue had begin to turn yellow.bye. i hope it is not the same problem with your crystal and sorry for my bad english." . .