One's signature piece or accessory can be anything, absolutely
anything. For some, it is a color, or even a particular shade of that color. For others, it might be a pattern, such as stripes, or checks, or polka dots.
Or it might be a certain fragrance. Mrs. Ray, in the
Betsy-Tacy books, always wore violet perfume. I don't think I could smell violet perfume without thinking of Mrs. Ray.
On the other hand, a signature piece can be just one
accessory. Not one type of accessory, but one accessory, and this, too can be anything, absolutely anything. Perhaps a string of beads, or a pendant, or a hat, or a hairband, or a bracelet, or a scarf, or.. (you can finish the list with anything and everything that comes to your mind.)
Well, I decided that I wanted a signature piece of my own. Specifically, I wanted a pendant. I shopped online in search of one, but I couldn't find one that I both liked and could afford.
So what did I do? I made a pendant out of the blue plastic aquarium plant frond in my Break-Off Collection, and a trimmed rose-pink former shoe lace. I still consider that frond to be part of my collection, but now it is also a functional piece.
My signature piece.