My boyfriend and I are shopping for rings and came across a nice one made with 18k white gold at Birks. if you purchased 18k white gold engagement/ wedding ring from Birks, could you share your experience around the ring overtime? did the color become dull quickly (picture will help)? how about the maintenance of WG (do you wear it everyday? how often does it need to be re-plated with Rhodium.?...or do you just leave it like that? sometimes the warm white color is nice too)? I assume their 18k is a mix with nickel?? Thanks in advance !