Horn Silver

Discussion in 'Ancient Coins' started by physics-fan3.14, Sep 4, 2016.

  1. TIF

    TIF Always learning.

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  3. desertgem

    desertgem Senior Errer Collecktor

    Oxidation-Reduction reactions involve the transfer of electrons from the oxidized element to the reduced element. The mass of an electron is so small
    9.109×1028 gram

    The measurement would not be noticeable.
     
  4. -jeffB

    -jeffB Greshams LEO Supporter

    Oxidize a hydrocarbon to carbon. The hydrogen goes away as water, resulting in a loss of approximately 1/7 of the hydrocarbon's original mass. Oxidize it some more, to water and carbon dioxide, and it all goes away.

    Reduce a ketone to a secondary alcohol; it gains the mass of two hydrogen atoms.

    I'm up for a pedant-off about definitions of oxidation and reduction, but it probably ought to go into another thread, certainly another forum, and possibly another site. ;)
     
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  5. desertgem

    desertgem Senior Errer Collecktor

    My assumption was that we were doing coin metals where the products did not turn into products that could evaporate over a very short time. :)
     
  6. Alegandron

    Alegandron "ΤΩΙ ΚΡΑΤΙΣΤΩΙ..." ΜΕΓΑΣ ΑΛΕΞΑΝΔΡΟΣ, June 323 BCE

    [​IMG]

    Apollonia Pontica Thrace AR Diobol 1-3g 410-323 BCE Apollo-Anchor crab A Tupalov 56.JPG
    Apollonia Pontica Thrace AR Diobol 1-3g 410-323 BCE Apollo-Anchor crab A Tupalov 56
     
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  7. joecoincollect

    joecoincollect Well-Known Member

     
  8. joecoincollect

    joecoincollect Well-Known Member

    i think i ran into horn silver recently. This coin was very dark on outer layers, mineralization above that made it look like an encrusted bronze. I started digging through, it had a thin gold plate layer and underneath billon i think. Either billon is normally dark or this is horn silver. Very soft, hard to remove with taking more billon/silver away. A0787D77-B6BA-4A12-8533-A21E72484D17.jpeg
     
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