This is an item that was made during one of those orgy meet-ups that is held by the royal family. In olden times they would invite members of other royal families from other countries to their confines, where they would dress up in strange outfits and have orgies. Nowadays they invite celebrities and world leaders to do the same. There aren't "royal families" per se, but the most powerful and elite are invited to take part if they so desire. And who would say no? It's the royal family. Their magic is deep-rooted and extends far back hundreds of years ago, even before the Rennaisance.
This particular piece was made a royal during which a blood ritual is performed. This is basically the nice way of saying human sacrifice was performed. This person was let of all of their blood, which was them drank by the attendees as a way of summoning the gods. The gods, being filled with the intoxication of the blood as they feed off of th energy of the people, grants them anything that they ask for. This time it was wealth that they wanted. It's wealth a lot of the times. With money comes power and then more money.
The piece that this power was set into was appropriately a fishnet style necklace with dangling coins. It is symbolic that the power in this piece will make it rain wealth and abundance for whoever owns the piece.