My favourite gold miner is a little different. Soon to be listed on the ASX will be E3S (E3sixty). Essentially they take e-waste as whole items (phones, laptops, tower computers, PCB's etc) requiring no deconstruction - batteries and all - and process them in a way that produces cleaned emissions and a synthetic ore containing between 150 and 550 gpt gold (depending on feedstock). Aluminium and steel frames and chassis are recycled and significantly cover operating costs. Importantly the synthetic ore is not amalgamated so all elements can be recovered including gold, silver, copper, palladium, platinum, rare earths, lithium and cobalt.
This co solves a staggering ecological problem (ewaste is brutally toxic), securely destroys data, and recovers that which has already been mined in an exothermic way allowing heat/electricity capture. Metrics on profitability cannot be shared at this time due to the proximity to listing suffice to say that I know of no other zero cost primary gold miner.
Get in touch for more information.