In 2006, to celebrate the Queens 80th Birthday, Westminster released a Limited Issue £10 Ten Pound Silver Proof Coin struck in solid .925 Sterling Silver weighing five ounces of Silver with a genuine Brilliant Cut 10 Point Diamond set in the coin.
The reverse is 4 portraits of Queen Elizabeth II and the obverse is a portrait of Queen Elizabeth II designed by Raphael Maklouf.
These legal tender coins have been struck to proof quality using specially prepared dies and highly polished blanks.