The comparison being to conflict diamonds (and conflict-free diamonds) - a lot of wars are fueled and escalated by revenues from natural resource extraction, an

The comparison being to conflict diamonds (and conflict-free diamonds) - a lot of wars are fueled and escalated by revenues from natural resource extraction, and a pretty simple kind of ethical consumption is to decide to not buy diamonds from, say, the DRC. The market will adapt somewhat, especially if the good is a commodity whose origin can be obscured in the supply chain, but substituting a whole different good avoids that problem. Buy gems other than diamonds, for example.