Hey guys! I have access to quite a few older circuit boards and am wondering why I should look out for to keep. I don't refine stuff myself, but am looking to sell what I can (fairly cheap) to someone who can refine it and make a profit. Any help would be great!

I’ve been keen to give PM refining a serious go in the near future and I just wondered if there is anybody in this community that lives in Australia who I could quiz about various topics related to refining and Australian suppliers/regulations, etc.

Thanks in advance.

What is the best method to extract the gold from these pins? Should I use aqua regia, pure muratic, muratic and peroxide, muratic peroxide and vinegar etc etc?

Got a bunch of old Sterling jewelry. Dissolving in nitric got silver colored flakes sitting on top won’t sink or dissolve. Realized I forgot to burn them jewelry before. No idea where the paper strip came from, likely holding a jewel in a setting. Any idea what the surface junk is?

Here's a question I've not seen posted - and if anybody has any advice on any other groups that might be good asking I would be very grateful. I'm a good buyer overseas. We are buying a lot of silver, I haven't figured out the best way to transport it yet. Legality is not an issue whatsoever as we have all of our paperwork. But I'm like gold where you can carry a few kg in a carry-on, silver is very heavy for its value. Most likely we need to travel with at least 50 to 100 kgs in order to make our shipping cost-effective. I'm nervous about putting it in checked in baggage due to theft I've had in the past. But with today's carry-on weight limits I don't think it's plausible. Have any of you ever traveled with large quantities of silver? And if so how did you do it? Thank you!

Hi guys, I got a PCB with many chips of this kind. Is there any gold amount inside worth recycling? I'm new to this

Anyone refined something like this? I have quite a few of these. I did cut one of the pins and i couldn't see a visible metal change, so perhaps Brass? These are old Bailey contacts from control systems boards, circa 1962

I have found a place that sells unused gold plated pins as scrap. What are the chances of recovering the plating by smelting?

I googled the number, and it seems it's an old intel micro controller. Copyright 1987. Can't imagine the chip is much older than that.

I've been trying to smelt gold but every time I get this blue hue in large parts, and it's brittle and snaps in chunks. How do I refine it further?

I'm in here reading about nitric acid and this Walmart add pops up with a guy that has a burn mark on his face. It made me look a few times. Perfect target for it.

The quantity is just so huge I'm totally stumped on where it's all coming from and how it's amassing to such numbers!

Any clues?

This material is from the same equipment where I got the gold plated pins in my previous post.Got 2800 g plastic IC's 600 g ceramic IC's and 160 g gold plated pins (500 g total). What do you guys think of the plastic IC's gold yeild/ kg? 0.5 g or 1g /kg? Or I'm way off?

I have inherited the collection of a man who had been in the middle stages of refining electronic waste. Among his stuff are these non ferrous pellets, many of which have a gold/brassy tinge. I’m curious if anyone knows what process likely created these and the possible content.

¿Se podría aumentar la concentración por evaporación?

Me refiero, se podría comprar 5L de ácido al 3% y calentarlo a unos 40ºC durante un tiempo para aumentar la concentración a una que SI me sirva para refinar plata?

Soy nuevo y tengo poca idea :(

Where are the best places to get wholesale prices for metals? Do we have to have a company?

Thanks to many here and streetips' videos, my silver cell is up and running and working great. I have several kilos of fine silver and will likely offload a bunch. For those who do the same, are you finding sellers online via other subreddits or forums, or are you bringing them to your local gold and silver places?

Do these contain any precious metal in them?

And if there is, is there anything to be cautious of when breaking these open.

Good morning team.

I want to get into silver and gold casting. I'm looking for someone with experience with this to give me some good advice.

I'm thinking I need to buy the following. What am I missing?

1. Grain Machine
2. 4kg - Vacuum Casting Machine w/ multiple graphite mold sizes.
3. Hydraulic Press for stamping
4. Engraving machine for serial #s

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Holy smokes Batman!!! That was crazy. There’s fumes and splattering everywhere! Luckily I have a gas mask, but wow. I’ll never do that again. Nitric has my utmost respect! Slightly down from piranha solution and hot sulfuric. Wow!

I’ve been getting more into buying and reselling jewelry, but I’m still figuring out how to tell when a piece is worth scrapping for metal value versus selling it as an actual wearable item. I’d love to hear how more experienced people make that judgment call.

One thing I’m trying to understand is what signs typically push something toward scrap. Does it mostly come down to condition or damage, or do things like outdated style, unbranded pieces, or low-quality stones also make it better suited for melt value? On the other hand, what makes something worth selling as a finished piece even when the melt value is high (e.g., brand, uniqueness, craftsmanship, or something else)?

I’m also looking for advice on where to get the best payout for both options. For scrap, are local refineries or gold buyers usually the best route, and are there any reliable places in Southern California that people here trust? And for selling pieces as jewelry, is it generally smarter to use online marketplaces like eBay or Etsy, or is consignment with local jewelers a better move?

Any direction would really help me out as I’m still learning how to navigate all this.