coin "conservation"

Lat night on PBS there was a show about the SS Republic and the hoard of gold and silver coins recovered from the wreck. They spoke of conservation of some of the silver coins and the difference in prices. What is condsidered "conservation"?
Molon Labe
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Comments
Jerry
---For Global it was the SS. Central America--- Why don't people use Global Certification? You can't tell me Jeff Garrett doesn't know what he is doing.
<< <i>What is condsidered "conservation"? >>
It's a special thing called Shipwreck Effect™ that makes junky coins worth lots of money.
Russ, NCNE