Amazon has some cool looking His & Hers Couples Stainless Steel Pendants for $2.99 (was $19) and $4.99 shipping.
Stainless Steel jewelry does not tarnish and oxidize, which can last longer than other jewelries. It is able to endure a lot of wear and tear. And it is amazingly hypoallergenic.
Go HERE to take a look!
I found this one also! It is a His & Hers music symbol necklace for $9.99 as well!