Interesting gold test

It's a youtube address, it opens correctly to a video "Testing Metal Detectors on a fragment of gold"

Thanks, I just do not open links where the poster doesn't have a reputation on the forum.
Marvin
 
I'm most interested in your avatar...

Any explanation? Looks like a trade brooch made of gold?

<°)))>{

It's a 14th Century gold brooch I found in the UK, it's now in a museum and is called the Eldersfield brooch, google it.
 
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