Gleich zwei Fehler in einem Satz, das tut weh.
Ich habe hier lediglich ein Schreiben der SA Mint übersetzt,
tu doch nicht so Oberschlau und übersetze es halt selbst und sag mir was an meiner Aussage falsch sein soll,
ich lerne gerne noch dazu Herr Oberlehrer.
Da bin ich ja mal gespannt.
SA Mint
CONTANIMATION OF 24 CT GOLD COINS
As 24 ct gold is made up of 999,9 gold, there is 0,1% that is made up of 18 other metals.
In terms of the weight of the coin, 3 mg of an ounce of gold is compiled by different metals.
The gold is assayed, to ensure that the purity of the gold is 999,9%
The reason for this allowance of other metals is due to the fact that the gold goes
through a process, where microscopic contamination can (and does) take place.
Investigations have proved that the spots that one sees on the coin are not the other metals in the gold.
These other metals are fine microns that react with the gold and cause the discolouration.
Again the cause here is not unrefined gold, but microscopic parts of "allowed" metals that react with the gold after a period of time.
This reaction will be influenced by factors such as humidity as well.
The large discoloured parts that look contaminated are in fact the reaction of the "foreign" metal with the gold and not the foreign metal itself.
If the coin is studied microscopically, it will reveal that the foreign metal is well within the 3 mg/oz allowance. Under a microscopic enlargement of 800 times you will only begin to see the actual foreign metal. This, in laymens terms would be like looking for the head of a pin on a rugbyfield.
etc.
This is a worldwide occurance.
king regards