Selling Jewelry to large corporations

I was wondering if anyone here has ever tried to sell any of your
jewelry designs to large companies such as J. Jill or some large
jewelry company. I am a very small-scale silversmith (working at a
Subway restaurant :frowning: ), and it was the suggestion of my girlfriend
to try and sell the rights to a few of my designs to some larger
corporations. Does anyone have any insight into the matter?