Inspired the book The Aeronaut's Windlass by Jim Butcher. In the series, all metal was covered in copper to keep it from corroding, hence the copper chain and wire. One of my favorite characters, Folly, carried around Lumen crystals and talked with them. She carried them around in bottles. The Lumen Crystals I made even glow in the dark like hers do!
The last element is the small cat charm, an ode to the true hero of the tale (in my opinion at least ^_^) Rowl the cat.