In 2000 to celebrate the new Millennium, the Perth Mint released a very Limited Issue Millennium Bi-Metal $20 Twenty Dollar Gold and Silver Proof Coin.
It features a solid fine .999 Gold centerpiece and is surrounded by a 99.99% pure Silver border. The gold centerpiece of the Perth Mint Millennium coin replicates a satellite view of earth, from 1,000,000 kms above the most northerly point of Australia, surrounded by a silver border carrying the inscription "Third Millennium First Day 2000".
On the obverse is the stunning portrait of the Queen by Ian Rank Broadley. These legal tender coins have been struck to proof quality using specially prepared dies and highly polished blanks.
Limited Mintage of 7,500 Worldwide
Special Bi-Metal Coin struck in Solid Fine .999 Gold and Solid Fine 99.99 Silver
Metal - Inner: Gold (99.9%) Mass 0.270 Troy Ounce; Outer: Silver (99.99%) Mass - 0.161 Troy Ounce
