The 1865 G$1 Gold coin, also known as the Liberty Head gold dollar, is a collectible coin produced by the United States Mint. It was minted during a time of significant American history and features a design by James B. Longacre. The coin contains approximately 1.672 grams of gold and represents a denomination of one dollar. Collectors value this coin for its historical significance, gold content, and the condition in which it is found, with higher grades commanding premium prices in the market.