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<p>[QUOTE="-jeffB, post: 3407048, member: 27832"]Ah, XRF.</p><p><br /></p><p>I've wanted to own one of these scanners since I first found out they existed. Point it at an object, get a quantitative analysis? Sign me up! Oh, they're $10K or more? Rats. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie3" alt=":(" unselectable="on" unselectable="on" /></p><p><br /></p><p>But I've seen some reports here (and maybe elsewhere, can't really remember) that make me think they're pretty easy to <i>mis</i>use, producing unreliable readings.</p><p><br /></p><p>In particular, I'd expect it would be hard to use them on something as small as a gold dollar without getting readings from whatever the dollar is sitting on. I'm seeing spot sizes of 5 to 10 mm, and a gold dollar is only 13mm in diameter; that's a challenging shot.</p><p><br /></p><p>As for the rim issues, I've seen some <i>really</i> funky rims even on three-cent nickels, and definitely on gold dollars.</p><p><br /></p><p>You shouldn't keep a coin you aren't comfortable with, of course.[/QUOTE]</p><p><br /></p>
[QUOTE="-jeffB, post: 3407048, member: 27832"]Ah, XRF. I've wanted to own one of these scanners since I first found out they existed. Point it at an object, get a quantitative analysis? Sign me up! Oh, they're $10K or more? Rats. :( But I've seen some reports here (and maybe elsewhere, can't really remember) that make me think they're pretty easy to [I]mis[/I]use, producing unreliable readings. In particular, I'd expect it would be hard to use them on something as small as a gold dollar without getting readings from whatever the dollar is sitting on. I'm seeing spot sizes of 5 to 10 mm, and a gold dollar is only 13mm in diameter; that's a challenging shot. As for the rim issues, I've seen some [I]really[/I] funky rims even on three-cent nickels, and definitely on gold dollars. You shouldn't keep a coin you aren't comfortable with, of course.[/QUOTE]
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