2017-P George Rogers Clark America The Beautiful Silver Burnished 5 oz Quarter - Gem in OGP T-22 The irradiator works as follows:

The irradiator works as follows: A mixture of radioactive antimony and beryllium is enclosed in a lead container

1955 Washington Quarter - NGC MS 66 - Gem Brilliant Uncirculated

Reverse: Crowned arms within branches

115019210056746oz

though it is expected to be available in bronze beginning sometime in 2020

2017-P George Rogers Clark America The Beautiful Silver Burnished 5 oz Quarter - Gem in OGP T-22 The irradiator works as follows:The George Rogers Clark National Monument, Indiana is the fifth release in 2017 of the 5 oz bullion America the Beautiful series. These are special numismatic collector's versions which bear the "P" mintmark on them (unlike the bullion version). The coin also has a special frosty matte (burnished) finish and they were sold directly to the public by the US Mint. Mintage: 14,731