In a nugget patch I’ve been working there is vein of green stone(chorite shist). It really sounds off my metal detector. I think it is loaded with pryrite. Is there a simple test for gold I can do? Also around this vein is decomposed bedrock that has a lot of black sand, not much gold. Could this sand contain gold that isn’t
visible to the eye? Any suggestions?
For iron pyrite (sulfide), here’s the test:
(In a ventilated area… using a small sample)
Crush and roast the sample at high heat.
When iron sulfide is roasted, the sulfur vaporizes and results in iron.
The iron will pick up with a magnet.
Check this website out for a full answer:
“The reason most prospectors know a lot about the appearance and habits of iron pyrite is twofold:
1) To keep from being fooled.
2) Because of the known association between pyrite and gold. Pyrite is found in, or asociated with,
more than 70% of the world’s gold deposits.”