necklace amulets
Amulet / Talisman necklace with small glass feet. Meaning?

Hello! My friend has recently launched a necklace from a trip to Mexico, the amulet should AN be. He does not tell me, what glass hanging the little feet to stand in the chain for (there are about 3 different colors). Who ever heard / Seen such a thing before? Any ideas?

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Arcane Stream Necklace ( New Dungeoneering amulet ) @ DKS