Copper dime

Hey, why not weigh it first. It is cheaper than any other method. Let me know its weight in grams, my friend.

 

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X-ray wont tell anything different.
You've been told that it's plated by one of the true experts.
Enjoy your fantasy...

 

I figured he would tell me it weighed what it should weigh, proving there is no missing clad layer, and as Fred said, it is likely plated. So it could weigh even more

 

It might, an XRF test would probably penetrate the plating and show a high nickel content.

 

Depends on the unit... https://www.olympus-ims.com/en/webinars/xrf-for-regulaton/

Emphasis added... an XRF should penetrate the plastic slab, but other postings say as little as 6 microns penetration of pure gold. Gold plating runs from 2.5 to 40 microns. At the upper end, it would seem the XRF wouldn't penetrate...