Fairy Glass, a magical object left behind?
If I had to guess, I would say they look like they have been made with recycled glass and a secret mixture of german glass glitter and maybe fairy made pigments?  I can also tell its been soldered using a lead free, jewelry grade solder. 
The chain is just a smidge under 9 inches down each side of the cute satelite chain.
Every one is one of a kind! Quite lightweight, too!
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Sometimes there are even earrings with the Fairy Glass!