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Very rare and hard to get hold of.. sold out everywhere.
Its a replica of the locket (with moodstone) that the Meerjungfrauen wear in the TV Zeigen H2o Just add Water and is an official licensed product.
The halskette is great quality. It is a highly polished stainless steel halskette that looks like silver. The locket opens and has three pictures of the Meerjungfrauen to put inside (or Du can use your own photo).