Being a relatively new precious metal, palladium coinage has a rather short history. The first known palladium coin issue is the 1967 Tonga. At the height of the cold fusion frenzy in 1989, various companies minted palladium coins, the most common being the Cold Fusion series of palladium medallions marketed by Benchmark Commemoratives from New Hampshire.
Since then a number of countries have issued coins in palladium. The Perth Mint of Australia minted the highly popular Emu series of palladium bullion coins from 1995 to 1997. Unfortunately, the series was suspended in 1998 when the price of palladium doubled.
More recently, China launched the half-ounce palladium pandas in 2004 and in 2005, the popular Canadian Maple Leaf series of bullion coins became available in palladium.