Dear Avalon, currently there are only 2 ways to send a ring:|
(1)Suitors can send a ring as a gift via proposal.
(2)Married players can use gold coins to send a ring as a gift in the shop.
(Click "Gift" when buying the ring in the Shop)
About your ring, we suggest you keep it for future usage should the game make any changes in the ways of sending a ring.
Thank you very much for your support to the game!