This is the the accessory that sits on Luka's chest area... I have no idea what this is. An instrument?... in any case, I made this for a synchronicity cosplay, but I believe it should be the same as all the other versions of this.
The pictures you see are exactly what it looks like right now. If you want I can touch it up with another layer of gold, but keep in mind that this was home made and is slightly fragile. The safety pins are what holds it in place at the back.
The dimensions are approximately 14X12 cm. This item ships from Canada and the shipping cost is not included (will be approximately 7$ USD to the states). The price is negotiable. PM me with any questions ^^ (I can also tell you the materials used if you want to make your own)