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Re: [Orchid] Copper to silver weight conversion factor  
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From: Kevin Courter
Date: Sun Oct 14 04:48:31 2007
 
     
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Hello Marc,

    I found this table:
    http://www.jccojewelrycastingservices.com/metal_conversion_charts 

    which says to multiply weight in copper by 1.16 to get weight in
    sterling. 

    and then tried to verify it using some lower level numbers:
    pure copper: 8.93 g/cm^3
    pure silver: 10.49 g/cm^3
    Sterling: 0.925 silver, 0.075 (mostly) copper

    (percent silver)*(mass silver) + (percent copper)*(mass copper) =
    mass sterling alloy 

    0.925*10.49 + 0.075*8.93 = 10.37 

    So a cubic centimeter of sterling should mass about 10.37 grams,
    while a cc of copper should mass 8.93 grams... meaning the sterling
    is 1.16 times more massive. Yay! 

Kevin
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