LPT If you're thinking about getting engaged, seriously consider getting a Moissanite engagement ring rather than a Diamond. They are cheaper, guaranteed conflict free and are superior to diamonds in many aspects.

Diamonds are near impossible to track to their origin, which means any ethically sourced stones might be legitimate or could just as easily be a blood diamond. Moissanite is an awesome gemstone and beats diamonds in nearly every single criteria, such as fire, brilliance and toughness. Source.