In 2017 to celebrate the Platinum Wedding of Her Majesty Queen Elizabeth II and Prince Philip, the Perth Mint released a special Limited Issue Platinum Wedding $25 Twenty Five Dollar Gold Proof Coin struck in solid fine .9999 Gold weighing one-quarter of an ounce of pure Gold.

The reverse designed by Alesha Howarth features the Shield from the Royal Coat of Arms from the United Kingdom alongside the Coat of Arms of His Royal Highness Prince Philip, Duke of Edinburgh while the obverse depicts Ian Rank Broadley's portrait of Her Majesty Queen Elizabeth II.
These legal tender coins have been struck to proof quality using specially prepared dies and highly polished blanks.

• Limited Mintage of 1,000 Coin Worldwide
• Finished to Perth Mint's Proof Quality
• Struck in Solid Fine 999.9 Gold Weighing One Quarter of an Ounce of Pure Gold
• Celebrating Platinum Wedding of Queen Elizabeth II and Prince Philip
• Perth Mint Boxed with Certificate of Authenticity