Fine gold refers to gold that is nearly pure, typically with a fineness of 999 (99.9% pure) or higher. It is often found in the form of gold dust, flakes, or small nuggets in alluvial deposits, riverbeds, or as residual gold in quartz veins. Fine gold is more challenging to recover due to its small size, but specialized mining and refining techniques, such as sluicing, panning, and chemical extraction, can improve recovery rates.