Ultrasonic Test Meter Best To Verify AU & Ag Authenticity?

mdp: please do not be offended... it's just that I have no information on this technique what so ever!

I have always used S.G., measurements and "ring" as my tests... However I rarely buy from a source I am not comfortable with or that doesn't have a good reputation.

My opinion ... if I were to come across a "garage sale" with gold coins I would already be skeptical.. but that's perhaps b/c of where I'm from... if you sold gold coins in my neighbourhood at a garage sale... you would be in essence saying "hey look at all these valuable and yup they're at this residence".. you could expect a call or visit from some neighbourhood neadrathals within the day.

From a scientific point of view it sounds like it would work... sound waves move through different materials at different rates... but with gold and tungstun being so similar in molecular structure and density I think the measuring apparatus would have to be very very sensitive.

I know that there is a hand held portable device that was recently taken to a show in the states that would determine the content of a coin... even if it was in a slab.. (perhaps there's someone out here that if they know what I'm talking about could provide the link)....

That piece of technology looks pretty promising..

As for the link you provided.. this is the first I've heard of it... so for me the jury would still be out until I could test or use it myself.

More often than not some of these estate sales are the result of someone's significant other passing on resulting with the other half acquiring numismatic assets prompting their desire to acquire some quick cash.

And keep in mind that any adroit buyer MUST always pose a form of the following question to the ‘assumed' non-numismatic-educated owner,

'Do you happen to have any coins or jewelry from a deceased spouse or relative that really didn't mean much to you or better stated: no existing emotional attachment...?'

I can, however, understand one's skepticism if a scrapper were to run into someone at a garage sale with a decent amount of numismatic knowledge trying to sell gold coins.

mdpmedia

I just bought and picked up this device in USA few days ago.


So far, only able to test on 3/4oz Grey Wolf Silver Coin, and the test was accurate.

Will test more coins& bars when I get back to Canada.