How to extract gold from large volumes of ore from A to Z (Technology and Process)

In this video, I demonstrate how to extract gold from a complex ore. I believe my samples contain gold telluride. Precise identification of the mineral is difficult, but several characteristics point to it. For example, the gold is light in color, significant losses are observed during pulp washing in the sluice, and boiling the concentrate in sodium sulfide dissolves the gold precipitate, leaving a dark brown suspension. There are also other characteristics that point to the presence of the mineral tellurium. What I do with this ore in this video is crush the ore, remove the light fraction, and process the remainder chemically. This is a high-quality ore and does not require beneficiation; the entire volume is processed chemically with mixing. Accurate analysis confirms the high gold content of the ore. However, the gold in the ore is bound to tellurium or a similar mineral, making it impossible to extract using simple methods, so I have to use a complex, step-by-step technological process.