I read an interesting article last year by someone from France with some impressive gold!
https://www.xpmetaldetectors.com/en/ba/the-blog/gold-prospecting-in-africa-with-the-xp-deus-v3.php
Incidentally, a man in Cameroon messaged me on FB not too long afterward trying to identify some crystals. They were nothing valuable but then he told me he wanted to get a gold detector there so he could join the rush but of course he doesn't have the resources and needs help. It made me wonder if some enterprising person there in Africa could make a business grubstaking local prospectors with detectors.