Key to My Heart

So two years ago the first piece of jewelry my boyfriend got me was this beautiful heart key necklace with a sterling silver chain broke while at work. I still don't know how cause I don't remember anything getting caught on it and I wear it all the time and at the time had had it for 4 years with no incident. I used another chain from a necklace then last summer I decided to try and incorporate things into chainmail so I made this beautiful byzantine bright aluminum choker chain for it. One day when I have the money I replace the bright aluminum sterling silver jump rings but this will do for now.