Yes. Gold that is found in nature is rarely pure. It is commonly found
alloyed with silver, and slightly less commonly found alloyed with copper.
It is also found alloyed with other elements, such as tellurium, or members
of the platinum group. One might expect combinations of several elements.
Each of them have a profound effect on the color of the nugget. Not only
will the appearance vary by location, but gold content is likely to as well.
In my years of refining, I processed gold that ran as low as 30%, and as
high as 96% as found in nature.
While it may make little sense to you, the addition of silver to gold yields
green gold, quite unlike anything you might imagine. The addition of
copper yields red gold. A balance of silver and copper alloyed with gold
will yield a subdued golden color we have come to expect from gold used in
jewelry. The addition of nickel or palladium yields white gold.
Pure gold has a look like nothing else. At the risk of offending, I'm
going to email you a picture of a bowl of gold shot, pure, so you'll
understand the color. The shot in the picture is gold that I refined, and
is how it was dispensed to the customer, normally manufacturing jewelers.
The shot form allowed for the small amounts to be weighed precisely for
alloying, which is customary for the average benchman.
Just yesterday I was looking through old "nugget shooting" posts in
Google (just got a new metal detector early for Christmas) and saw a
post describing how the gold found near the silver mining districts
would look pale due to the high silver content. Fairly common out here
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