My SO did not want a traditional diamond gold engagement ring due to normative ways, consumption, global diamond trade, etc. but it’s hard to not buy such a thing number one, and two, u have to wear it each day. I bought a polar bear diamond (Canadian) which in addition to being mined in a friendly way (environment, labor, etc), uses a cut that hides its size. It’s brilliant in the light and sparkles like no other. Then I chose platinum as it isn’t as showy as gold and doesn’t corrode like silver. So overall, it’s an amazing ring to look at, isn’t traditional but so too hides its cost. Rings are for spending time thinking about your partner and what they want to be shackled with. She really liked it, even though she never would have expected it to look like what it is.