Gold ore & gold precipitating problem

[happyprince]

Hi,
I have some gold ore and actually it is very rich in gold.(It was tested and high amount of gold found in it.)however when I dissolve gold in aqua regia I by no means could not precipitate the gold in the Aqua regia.I tried every method and chemicals but no use.Then I tried mercury method and got good amount of gold.However when I did the same method second time,I could not get any gold.I used the same ore and the same method.(First boiled in nitric acid,etc.)I do not know why it did not work.I tried many times but no way.I used the same mercury when I got the gold first time.Might it be the reason?Can anybody help me either in precipitating gold in Aqua Regia or mercury method?Any help will be highly appreciated.(I used sodium metabisulfite,ferrous sulphate,etc.to precipitate)I have uploaded two photos of the ore.Thanks a lot...

 

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[NeoTokyo]

Welcome to the forums.

So crushing it up and soaking it in Aqua Regia didnt work?

 

[MrLee]

There is also a method using borax instead of Mercury on youtube. I know this doesn't help your problem, but it may expand your options.

 

[Goodyguy]

If your ore is crushed to fine dust then the mercury should capture all the free gold. Whatever is not captured is not gold. (mercury will capture some other metals as well) Once the mercury is saturated (turns lumpy) then it's time to use the retort and your cleaned/distilled mercury will be ready for reuse.

GG~

 

[Oakview2]

Pretty good series

 

[Goodyguy]

Good video's
Didn't know about "charging" the mercury to cause it to better attract the gold.

I like my store bought retort better though, much easier to use.

GG~

 

[TAKODA]

Hi,
I have some gold ore and actually it is very rich in gold.(It was tested and high amount of gold found in it.)however when I dissolve gold in aqua regia I by no means could not precipitate the gold in the Aqua regia.I tried every method and chemicals but no use.Then I tried mercury method and got good amount of gold.However when I did the same method second time,I could not get any gold.I used the same ore and the same method.(First boiled in nitric acid,etc.)I do not know why it did not work.I tried many times but no way.I used the same mercury when I got the gold first time.Might it be the reason?Can anybody help me either in precipitating gold in Aqua Regia or mercury method?Any help will be highly appreciated.(I used sodium metabisulfite,ferrous sulphate,etc.to precipitate)I have uploaded two photos of the ore.Thanks a lot...