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<p>[QUOTE=&quot;chrisild, post: 3624039, member: 39&quot;]These Austrian silver-niobium pieces I find attractive too, but when they went from one color for the center to more, I stopped collecting them. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie2" alt=";)" unselectable="on" unselectable="on" /> Yes, niobium looks gray-ish, and the color comes from the oxidation process ...</p><p><br /></p><p>What I also like is the &quot;copper-nickel-polymer&quot; coins from Germany. They consist of Cu-Ni in two different alloys, and a colored (€5) or transparent (€10) polymer ring. The color shade even varies with the mintmark. Below (<a href="https://www.emuenzen.de/bilder/detail/34129u.jpg" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.emuenzen.de/bilder/detail/34129u.jpg" rel="nofollow">embedded image</a>) is this year&#039;s 10 euro coin:</p><p><br /></p><p><img src="https://www.emuenzen.de/bilder/detail/34129u.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>This particular design may not be thrilling, but the ring is cool - and yes, if you hold a finger behind it, you see parts of that finger through the &quot;plastic&quot;. Problem is, many innovative or experimental designs are limited to such collector coins while the regular circulation coins do not profit (or suffer <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie2" alt=";)" unselectable="on" unselectable="on" /> ) from them. If you look at Krause&#039;s COTY award for example ... they have quite a few different categories, but only one, I think, for coins that actually end up in people&#039;s pockets.</p><p><br /></p><p>Christian[/QUOTE]</p><p><br /></p>

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