My engagement ring is very simple, just yellow gold with one small, square cut diamond. i absolutely love it but would like something a bit more sparkly on my finger so was thinking of having an eternity ring instead of the traditional wedding band. Something like this http://www.brilliance.com/sites/default/files/rings/diamond-eternity-wedding-ring-yellow-gold-details-1_0.jpg
I don't really know the etiquette of rings. Would it go or not, and does it have to be gold?