Sleepyman1
From your pictures - it looks like you are working out of regular canning jars - those are made of lime glass & though you can "get away" with using them - they are subject to breaking when you apply heat to them which in turn can/will lead to loosing everything when they break
we need to get you better equipped (your gold isn't going anywhere)
Besides needing to put things on a hot plate - chemical reactions produce heat which can cause "jars" to break --- also - do not trust Pyrex like Pyrex measuring cups etc.
You need to get some borosilicate glassware - beakers are made of borosilicate glass - so are coffee pots - go to the local thrift store & buy yourself some glass coffee pots - also when you are at the thrift store - if you see any Vision Ware pots like these - BUY THEM
https://www.amazon.com/Visions-5-pi...hvlocphy=&hvtargid=pla-4584482455093644&psc=1
That said - lets move on from where you are now that you have dissolved what has dissolved with water
You have three different things - we will address them one at a time
The solid hard material did not dissolve any and I have it on heat right now.
If - as it appears - you are working out of "jars" I am a bit concerned --- I hope it has not broke on the hot plate &/or if you took it off the hot plate broke when it cooled
If it is still on the hot plate (& has not broke) take it off the hot plate BUT FIRST have a "catch bucket" to put the jar in when you take the jar off the hot plate as the jar "may" break when it cools --- if you think the jar is hot enough to melt plastic put a plate in the bottom of the bucket & set the jar on the plate
Once you get some glass coffee pots to work out of (&/or Vision Ware) we will get back to this
The black material dissolved quickly and produced a blueish liquid with white powder and some blackish powder at the bottom
Lets address this one first as I "think" the black solids "may be" where at least "some" of your gold (& copper) is
The white solids are likely copper(1)chloride (CuCl) and as well "may be" some sodium salts/compounds
The CuCl will dissolve in HCl --- the sodium (if any) may - or not - dissolve with HCl --- that doesn't really matter at this time - but - what we want to do is get rid of the CuCl
So what you need to do if pour or siphon off as much of the blue water as you can leaving the solids in the jar (the more water you can pour/siphon off the better)
A plastic bucket will work fine for putting the blue water in (we still need to test this)
Then - the solids in the jar - you can do this in the jar (though a coffee pot would be better) just be sure you do it with the jar in a catch bucket/pan --- add some HCl - the HCl will dissolve any CuCl --- it may - or not dissolve other stuff - that's what we want to find out
Start with a couple cups of HCl --- lets see what dissolves & what doesn't - if not everything dissolves add another cup or two of HCl & see if more dissolves - or not --- test for Ph - you want to get to Ph 1
If nothing more dissolves (assuming there are still solids) after the second addition of HCl (& Ph is at 1) we are done with this step
Test this HCl acid solution with stannous
Let us know the results & we can then move on to the next step with these solids
Concerning the blue water you poured off
The blueish liquid tested 5 pH.
you clearly have copper dissolved in this water & more likely then not there is no gold in this otherwise it would likely be more green then blue - BUT - we want to test just to be sure
Ph 5 is high for an accurate stannous test so you want to adjust the Ph down to at least Ph 2 with HCl --- it won't take much - start with say 2 or 3 ounces & add an ounce at a time till you hit (at least) Ph 2 & then test with your stannous
There is more then one way to do a stannous test - my preferred way is to dip a Q-tip in the solution to get it wet & then put a drop of stannous on the solution wetted Q-tip which will turn purple if gold is in solution
So if you don't get a (purple) positive stannous test we are done with that solution & it can go in you waste solution bucket (we will deal with your waste later)
IF (the BIG IF) you do get a positive test we will deal with that once we know that
Lets get this one done - see what the results are - before moving on
Just a couple more notes; ------
These things always work better if you can provide heat so it's better if you can do it in a coffee pot on a hot plate at a "low" setting --- in this case you can "get way" doing it cold in a jar as the CuCl is easily dissolved in HCl - just be sure to keep the jar in a catch bucket/pan
Also - when dissolving these solids you want to stir them up into the acid so you need a plastic or glass spoon/rod --- NEVER use metal
Kurt