Yes. There are many European bead style companies such as Chamilia, Pandora, trollbeads, etc.
Chamilia beads are fully compatible with Pandora bracelets. Both companies use a 3mm sterling silver chain and the beads from either company will fit the bracelet of the other. The one difference...
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Definately Trollbeads was first.
No. A UV Bead will change color when exposed to sunlight.