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<p>[QUOTE=&quot;Pete Apple, post: 3841961, member: 103982&quot;]<b>The weight of a Silver Clad Quarter, adjusted for tolerance, is too close to the weight of a Cupronickel Clad Quarter, adjusted for tolerance, to identify the type of cladding. </b></p><p><br /></p><p><b>Quarter 1947-1964 = 6.250 g +/- 0.194 g (900 Ag 100 Cu)</b></p><p><br /></p><p><b>Weight of Clad quarter 1965 – to present = 5.670 g +/- 0.227 g (75 Cu, 25 Ni on pure Cu) </b></p><p><br /></p><p><b>(1976 = 5.750 g +/- 0.200 g - 40% silver clad) </b></p><p><br /></p><p><b>A specific gravity test can tell. Specific Gravity Test. 90% Silver = SG 10.34; 40% Silver = SG 9.53 Cupro Nickel clad = SG 8.92 Copper Cent = SG 8.83; Zinc Cent = SG 7.17; Steel cent = 7.7 </b></p><p><br /></p><p><b>Here are instructions about how to perform a specific gravity test:</b></p><p><br /></p><p><b><a href="http://lincolncentsonline.com/Copper%20Or%20Zinc.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://lincolncentsonline.com/Copper%20Or%20Zinc.html" rel="nofollow">http://lincolncentsonline.com/Copper Or Zinc.html</a></b></p><p><br /></p><p><b>Another alternative to determine metal content is via an XRF Scan.</b>[/QUOTE]</p><p><br /></p>

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