Gold Investment Thread

Going strong

Hummingbird
Orthodox
Gold Member
I've got a question for specialists in bullions, or for smart chemists :

A friend of mine went to sell a gold coin (a perfectly good Maple Leaf) at a big jewelry store. Unfortunately the jeweller turned out to be a crook.

So the crooked jeweler says, "I'm going to test the coin for its gold composition. I'll drop a small drop of acid on the coin, on its border/brim... But first, look, to begin with, let's try dropping acid onto this pure square of gold that I have here with me, and, see, the acid does nothing"

(the crook drops acid or whatever on a small golden square thing, and there's no reaction.)

The crook resumes : "Good, now I'll drop my acid on your coin. It should produce no reaction if it's gold indeed."

(acid or whatever it is, is dropped onto the gold coin, at the border/brim, and startlingly, after a few bubbles subside, the border of the coin turns a very bright silver color, as if gold had disappeared to reveal silver underneath).

At this stage the crook says " Oh too bad, it's silver coated in gold, almost worthless". He then puts an oily brown liquid on the silver-coloured stain, "to stop the acid from eroding further the metal".

As a result, the gold coin (which is 100% authentic, by the way, it was proven later on by other means) is now stained, with a dark brown cloud over the gold, at the spot where the chemical products were applied.

So my question is, what was the chemical used to produce this bubbling, then the bright silver color onto the gold coin, and what other product was used later on to turn the "silver stain" into dark brown? Also, how to wash it. My friend washed it with white vinegar and the stain faded but far from totally disappeared.

Was this chemical reaction(s) due to the fact that the gold Maple Leaf has a very, very small percentage of some alloy in it (zinc or copper?) to make it less malleable?

I'm thinking now, was all this, Aqua Regia being poured onto a small part of the gold coin?
 
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Going strong

Hummingbird
Orthodox
Gold Member
I don’t know anything about the acids but gold maple leafs are 99.99% pure gold. No alloy is added.

Right, but as you said, 99,99 is not 100%.

Can 0,01 of a zinc/copper alloy, react to some Aqua Regia acid drop, by turning bright silvery coloured, then quickly turn to dark brownish red?

Or, which acid or fume-producing chemical, will turn gold (or 99,99% gold) into bright silver-like color for half a minute, before turning dark brown? Is it Aqua Regia mixed with, I don't know, mercury?

How can a colourless acid, presumably similar to Aqua Regia, turn fine Canadian gold into a bright silver-coloured thing, then by applying another oily chemical it turns very dark brownish red, and all of this without gnawing at the gold underneath the stain?

Can it be a dye? Can one dye fine gold coins? Or is it a strong, spectacular reaction of the 0,01% zinc/copper alloy or trace of alloy?

In any case it was a spectacular, and disgusting, con-artist trick performed by the crooked jeweler. Fortunately my friend was 100% sure of the authenticity of his Maple Leaf, bought at a prestigious store of Toronto, and weighing the exact gold once weight for the right volume.
 
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zoom

Kingfisher
Catholic
Gold Member
@Going strong

There is more to authenticating a coin than verifying the weight. What year is the coin? The gold maple leafs minted 2013 and later have security features that are very hard to fake.

Also I would consider posting your question on a coin collecting forum or on the reddit group r/coins/.
 

zoom

Kingfisher
Catholic
Gold Member
Love gold and silver but the verification qualities of these pale compare to Bitcoin, check the last posts, you get bitcoin you know it is 100% Bitcoin. What a pain in the neck to confirm if your gold is legitimate. Ill be very careful when deciding where to buy.

The proper phrase is "pale in comparison". I know English is not your first language. I'm just correcting you in order to help you further improve.

Gold has been faked since the beginning of time. It's not a new problem and there are ways to properly authenticate gold. The modern coins in particular have security features that make them nearly impossible to fake.
 

Going strong

Hummingbird
Orthodox
Gold Member
Maybe the coin is fake.

It has been deemed true by several jewel specialists, who by the way needed just a few seconds each to check and decide that this particular Maple Leaf is genuine. By checking weight to size ratio, or using a hand-held electronic device, or looking at the laser marking or a combination of the 3.

I suspect that the crooked jeweler is a Breaking Bad-level evil genius, after all he works for several shops and they're probably complicits. Maybe he's found a way to pour mercury onto gold and make it stick for half a minute, mixing it with a very small quantity of Aqua Regia to produce fume? All this without heating it, no electrolyte or whatever, and acting gloveless (adding sulfur or salt from his fingers?) - just by dropping something on the gold : the man is some Walter White peril.
 

Road2Damascus

Robin
Orthodox Inquirer
Probably using nitric acid. The test is stupid because there are stainless steel alloys that will pass the acid test and contain no precious metal at all. The coin will still be worth close to full price even with the blemish.
 

Eusebius Erasmus

Ostrich
Orthodox
@Going strong

There is more to authenticating a coin than verifying the weight. What year is the coin? The gold maple leafs minted 2013 and later have security features that are very hard to fake.

Also I would consider posting your question on a coin collecting forum or on the reddit group r/coins/.

Correct. You need a weight scale and a density scale, at minimum, to verify authenticity.
 

Road2Damascus

Robin
Orthodox Inquirer
The proper phrase is "pale in comparison". I know English is not your first language. I'm just correcting you in order to help you further improve.

Gold has been faked since the beginning of time. It's not a new problem and there are ways to properly authenticate gold. The modern coins in particular have security features that make them nearly impossible to fake.

Yes bars are much more likely to be faked and some people will drill through them. The fakes are filled with Tungsten, which has almost the identical density as gold.
 

sea_pilgrim

Pigeon
Orthodox Inquirer
By my eye, this week the DXY broke down and failed at the important 103 level, and XAU/USD (gold) broke out to ~18 month highs against the US money supply. Fall/winter of 2018 was the last time there was a similar setup, in terms of gold taking out previous resistance on this chart. I'll be buying dips to hedge remaining dollar exposure. I'm having trouble pasting the chart, but you can chart "XAU/USM0".

It remains to be seen when GDX and GDXJ will break out against GLD, which will be another sign that it's a pro-gold market environment.
 

Going strong

Hummingbird
Orthodox
Gold Member
You're making mountains out of molehills.

Maple leafs are a very common gold coin.
Just get your friend to sell the one he has and buy a new one.
The melt value of a slightly damaged gold coin is still 90% to 99% of a shiny new one, unless it's a rare coin.
And use reputable dealers next time.

I'm interested because I think that we may have uncovered an organised ring of crooked jewelers, plying their illegal trade throughout various jewelry stores and conning naive people who sell their gold coins or artefacts. Well, I actually know we have.

But what's still unresolved is the chemical process they use to give a bright-silver aspect to a given spot on any fine gold bullion... Maybe, it's white phosphorus?

Or, they have found a way to plate rhodium onto gold without electricity/electrodes? Unlikely, but... Maybe it's chemical vapor deposit, of rhodium.

In any case, during this quick investigation of mine, I've learned how white gold is made by plating rhodium onto yellow gold, and how phosphorus was discovered by accident while looking for the elusive (and impossible) "secret" of gold making.
 
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Cynllo

Ostrich
Orthodox Inquirer
I'm seeing quite a few people touting miner stocks, particular silver. They are citing that there is very large demand for various metals this year, but stocks are depleted.

Yet, I think we are going to have another broad leg down in stocks this year. Maybe 3,000 on the S&P, a roughly 25% decline. I can't see there not being a further leg down of some sort. So with that in mind it doesn't seem like miners would do that well. Even if there is a real tight demand for metals, these stocks well get sold.

I'm eager to buy, but can't see anything safe. I picked up some more crypto last year, as if it wasn't for the likely coming further leg-down, it was obvious at it's bottom. But now that's on the move up with metals. Yet I see both as temporary.

What are some opinions of the outlook for the year? - @NoMoreTO , @C-Note

Here are a few of the threads I am picking up on:







 

Pointy Elbows

Pelican
Orthodox
^ This is a great website that has been mentioned here before:


TF does a daily run-down, and talks about miners often. He regularly interviews miner CEOs as well. It is pretty red-pilled, with a strong anti-vaxx crowd, just avoid JQ talk.

@Going strong, one of the threads on that site had instruction on accepted testing methods/equipment. I can't find it right now, but will keep digging.
 
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