This is a beautiful piece of numismatic art! What you see there is a 2011 Niue 2 Dollar Silver Proof 2 Oz Coin from the highly popular "Imperial Fabergé Eggs" series. ​This specific coin commemorates the Duchess of Marlborough Egg, which was the only large Fabergé egg commissioned by an American. ​Key Specifications: ​Issuing Country: Niue Island (a self-governing territory in free association with New Zealand). ​Face Value: 2 Dollars. ​Metal Content: .999 Silver. ​Weight: Approximately 56.56 grams (2 oz). ​Finish: Proof (mirror-like background with frosted details). ​Shape: Elliptical/Oval (to mimic the shape of an egg). ​Special Features: Often features selective gold plating (24K) and Bohemian crystals on the reverse side. ​The Series Context ​The "Imperial Fabergé Eggs" series is minted by the Mennica Polska (Mint of Poland). It is highly sought after by collectors for its intricate relief work and use of crystals. The Duchess of Marlborough egg itself was a pink enamel clock-egg made in 1902 for Consuelo Vanderbilt.