In 2019 to celebrate the Life of Stephen Hawking, the Royal Mint released a special Limited Issue Stephen Hawking 50p Fifty Pence Gold Proof Coin struck in solid 22 Carat Gold.
The reverse designed by Edwina Ellis features a Black Hole to celebrate Stephen Hawking's groundbreaking work while the obverse features the Fifth Portrait of Her Majesty Queen Elizabeth II by Jody Clark.
These legal tender coins have been struck to proof quality using specially prepared dies and highly polished blanks.