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<p>[QUOTE=&quot;brg5658, post: 1714619, member: 29751&quot;]The weight should be substantially different between white metal and aluminum.&nbsp; So much so that I&#039;d think you could tell the difference just by holding it (as I know you have quite a collection of medals).&nbsp; </p><p><br /></p><p>Alternatively, with approximate diameter measurement and thickness measurements you could calculate approximate volume (and subsequently mass).&nbsp; Aluminum weighs 2.7 grams per cubic centimeter.&nbsp; White metal (which I usually think of as being close to lead or tin) weighs around 7.4 grams per cubic centimeter (tin) or around 11.3 g/cm3 (lead).</p><p><br /></p><p>Edit:&nbsp; did a little math.&nbsp; If your medal is 45mm diameter, and assuming it&#039;s about 3-4mm thick then it&#039;s volume is roughly 4.8-6.4 cm3.&nbsp; If it is made of aluminum it should have a weight of 13 to 17 grams.&nbsp; If it is made of white medal (usually made of some combination of copper, tin, lead, antimony...etc -- all much heavier than aluminum) then it would weigh 44 to 70 grams.&nbsp; Now, if you mean a chemical test for determining its metallurgic composition, I know that NGC has capability to perform such a test -- but I&#039;d say that&#039;s beyond the everyday capabilities of most people machinery wise.[/QUOTE]</p><p><br /></p>

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