Ring around the roses

The word 'ring' is ambiguous (polysemous): it may mean 'a piece of jewellery' or 'phone' as in 'Ring me up'.

The object 'ring' may have a symbolic meaning (it's usually a symbol of commitment to someone or something, as in wedding ring).

The 25409 is most likely the design number, and the 750 means that the ring is 18K gold.

Tiffany's "Coin Edge" ring.

The Ring of Fire element is a penalty on the game Dungeons and Dragons. The person who holds this ring will take a saving throw penalty.