a small object worn to protect the person wearing it against bad things
Do I wear a key? Actually sometimes I do.
Does it protect against bad things? Well, I suppose in theory it should protect my home and my personal property when used to lock doors, etc.
But, more than that Key has so many more meanings. The best being "to be essential to". If anything can act as an amulet, I see a key as a perfect one.
That said, I'm a little torn with my finished product. I wanted to shine it up like my last one, but the husband said he thought it was best just like this. SO, here is my amulet: