925%Sterling silver and the Gold 1/3 Crown coin is. I have 2 sets of these coins and they are 2 of only 250 sets ever minted. They come with beautiful presentation cases and Certificates of Authenticity. The price is per set! The item "Greenwich 2000 The Millennium Observed Gold & Silver Proof set" is in sale since Friday, May 5, 2017.This item is in the category "Coins & Paper Money\Coins\ World\Asia\China\Mixed Lots". The seller is "cb_dash_18" and is located in Seattle, Washington. This item can be shipped worldwide.