Collectible coins, including those from the United States, often feature unique designs, historical significance, and varying composition. The 20 Twenty Dollar Gold Buffalo, introduced in 2006, celebrates the iconic Native American and Buffalo design originally created in 1913. The Gold High Reliefs, minted in 2009 at West Point, were produced as a tribute to the original gold coins and feature an enhanced, three-dimensional design. Collectors seek these coins for their artistry, gold content, and limited mintage.