Nice. Do you closely examine all your change or just casually once in a while?
I agree with edddiespin based on what this coin looks like. My only question is why hasn't anyone noticed this error before? If the die got...
No, basically XRF shots a beam of x-rays at the coin and the x-ray beam reacts with the metal atoms making up the coin which creates fluorescence...
Thanks Dave. That is a useful link which I didn't know about. I will definitely have to register there and try to start trading my duplicates...
Does anyone have a nice check list for your World Coin collections you are willing to share? What would be awesome would be to have a check list...
I just thought of that and edited it into my answer above and then after posting it notice that you had just said it. Yes I agree XRF is likely...
Good question. Macroscopic general refers to things large enough to be examined by the naked eye and microscopic is when you need a microscope to...
The coin must be out of its holder to image it and to do elemental composition work (Energy Dispersive X-ray Spectroscopy, aka EDS). Other than...
Glad you guys like them. You are the first people beside myself to ever see them. I just took those shots a few hours ago and haven't even shown...
A used one can run you over $50K. New ones go for over $250K.
I am not an expert but that does not look like a double die strike to me. At least not like what I have seen in other pictures of doubling.
I finally got around to taking a good look at my boot strap die break error. I used one of the scanning electron microscopes (SEM) at my work to...
Nice collection Dave. You should think of going to a coin show if they have one in your area. You will be able to grab coins from countries you...
The 20 Heller Coins of German East Africa are a favorite of mine as well. Thanks for that great article FredJB
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