It is well known that gold is extremely rare and that most of the gold available for mining within technology’s limitations has been mined. What many people may not know is that a large portion of the world’s gold is held in reserve by banks or individuals as a form of investment. “Gold Bar hoarding” is actually estimated to account for 236 tons of gold available that is not being circulated. Another key fact is that approximately 85% of all gold ever found is still in use today due to the recycling of gold items. Recently scientists have discovered that most asteroids are essentially warehouses of minerals serving as potential sources of gold, diamonds, and platinum. Lastly, gold prospectors do continue to search for deposits using various highly sensitive methods for gold detection.