Yep - the problem has always been processing and metallurgy,...

Yep - the problem has always been processing and metallurgy, gold and antimony are metallurgical arch-enemies and a nightmare to process as you try to recover one and the other metal works against you, thus ending up with Dore full of antimony, antimony concentrates full of gold and tailings material full of antimony and gold. Not to mention the very small specialized market for antimony-gold concentrates that is dominated by someone that you are not allowed to trade with (Russia). There are ways around these metallurgical problems, but they are all complex, energy intensive, expensive, capital intensive & require weird reagents and take time thus limiting your throughput.