I bought my now wife an enagagement ring from a regional specialist, and got our wedding wings from specialists locally and in london.
I was reluctant to buy a diamond ring knowing that the price of diamonds is over-inflated by the deBeers monopoly and skewed market as well as media pressure.
The ring we eventually settled on had two small diamonds (by engagement ring standards - still big enough to cost money) and a large amethyst in a nice gold setting.
Its hard to find a comprimise but we meet on the middle on issues like this , chocolate, fish, meat, charity, politics.
Although we are both politically aware we are passionate about different things and I would consider worldwide problems such as poverty, human rights, etc as more important than the national and local issues that concern her more.
Fortunately we are able to agree and make an effort towards both local and international things.