Every Shadowhunter family has a symbol, and the symbols are often worn on family rings.
The symbol of the Morgenstern family is a pattern of stars.
This is a sterling silver handmade ring as described in the books passed from generation to generation of the Morgensterns. It has an old world oxidized finish.
Don't know your ring size? check it here
I also carry in the store an inexpensive ring sizer.