Ultrafiltered
10C Clad


Obverse
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Reverse
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Coin Details

  

Set Details
Origin/Country:
Design Description:
Item Description:
Grade: NGC PF 70 UC
Owner: Rayshield
 
Winning Set: Ultrafiltered
Date Added: 1/4/2006
Research: See NGC's Census Report for this Coin

Owner's Description

With about a 1 to 4 ratio of 69/70's for clad versus a 1 / 2 ratio for silver, one could surmise that silver is the better coin metal for collection purposes. While, this is not the case for all certified coins, there is a difference that can be accounted for.<br /><br />Let's look at coins from a material properties standpoint (elemental basis) Nickel may be lighter per ounce, but it is a more brittle and stronger metal (Tensile strength = ~300 MPa, Eleasticity Modulus = ~200 MPa, Shear at ~75 GPa). Silver is more dense with more malleable properties (tensile strength = ~140 MPa, Elasticity Modulus = ~75 MPa, Shear at ~28 Gpa). <br /><br />What the numbers above tell you is.....If equal force was applied to a silver or nickel planchet, silver would have the deeper, more sharp image. In circulation though, silver will wear faster than nickel. <br /><br />In addition, silver, as an element, maintains a higher reflectivity coefficient than nickel (i.e., 0.9 silver vs. 0.4 nickel , 1 = perfect mirror). With that bit of information, its easy to understand why a nickel coin doesn't have as dark and deep fields as a silver coin. Silver is a better mirror to light. So as you look at the coin silver will appear bright and more cameo like. <br /><br /><br /><br />

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