Sorry, just fixed the links to the gold-related blogposts.
Take a closer look at the no 3:
Thanks to extensive discussion and creative thinking with Fairtrade and Valcambi, as well as our supply chain partners, we developed a model we believe fits the average electronics supply chain:
Our scalable Fairtrade gold sourcing model.
By mass balancing the gold earlier in the supply chain and paying the premium directly to the refinery but allowing the Fairtrade gold to be sold and shipped as ‘regular’ gold through the exchange, we are able to increase the amount of Fairtrade gold we are buying, connecting it to even more component manufacturers sourcing their gold through the SGE, and ultimately impacting even more people!
This seems to be a pretty straightforward explanation.
Furthermore, they publish and regularly update their suppliers list. You even can follow things on an interactive map: