After some nitric acid baths i have a dense brown precipitate, what is this? (Images attached)

[Ellias]

Agreed. It looks like a lot of leftover plastics.

I will do so upon recommendation! Thank you everyone

 

[Ellias]

Agreed. It looks like a lot of leftover plastics.

Alright you guys were completely correct. I burned everything again on top with 100g of new ic chips (low grade. Yeah loterally everything is ash and the texture is very very different. A quick question ( does carbon prevent gold from dropping or stop gold from getting into solution?)

So another mistake i made is putting my gold in a very dirty melt dish. The brown is looking very VERY silver....

Do i have to season the crucible with borax prior to dropping gold? I seen it before and after.

@BGDOCK @Shark

 

[BGDOCK]

Let’s try this one question at a time
Forms of Carbon can adsorb gold and thus can affect yield. Burn the IC chips until they are white then crush

Try using different crucibles for silver and gold otherwise you will have to get trace amounts of silver out of your gold.

Using borax while melting helps the metal flow and helps remove some impurities.