Discovering Placer Gold: A Guide
What is Placer Gold?
Placer gold is a type of gold that has been relocated from its original vein or lode due to weathering and erosion over millions of years. The gold is moved by natural forces such as water or glaciers, causing it to accumulate in crevices or deposits in rivers, streams, or other bodies of water. These locations are known as 'placers,' hence the name 'placer gold.'
Formation and Characteristics
The process of placer gold formation begins when gold-bearing rocks are exposed to the elements. Over time, the rocks weather and erode, and the dense gold particles are carried away by running water. These gold particles eventually settle in depressions or natural traps in the stream bed, where they form placer deposits. Placer gold retains its characteristic yellow color even after being subjected to weathering and erosion, making it relatively easy to identify. Its particles can range in size from tiny specks to nuggets, depending on the local conditions and the length of time they have spent in transport.
Mining Placer Gold
Placer gold has been a significant source of gold throughout history, primarily because of its accessibility. The gold can often be found near the Earth's surface in alluvial deposits, making it easier to mine than lode gold. The methods used to extract placer gold range from simple panning—still used by small-scale prospectors today—to more complex techniques like dredging and hydraulic mining.
Common Questions About Refining Placer Gold
Can placer gold be refined?
Yes, placer gold can be refined to remove impurities and achieve a higher level of purity. The refining process typically involves melting the gold and using chemicals to separate the gold from the remaining materials.
What is the process of refining placer gold?
Refining placer gold often begins with cleaning to remove any remaining dirt or gravel. The gold is then melted in a crucible, and borax or another flux is added to draw out impurities. Once the gold is melted and the impurities removed, it's poured into a mold and allowed to cool and harden. The gold is then polished to a high shine.
How much gold can be recovered from placer deposits?
The amount of gold recovered from placer deposits can vary widely and depends on factors like the richness of the deposit, the efficiency of the mining and refining process, and the skill of the miners.
Is it worth refining placer gold?
The value in refining placer gold depends on several factors. If the placer deposit is rich in gold and the price of gold is high, refining could very well be profitable. However, the costs and complexities associated with mining and refining placer gold should also be considered.
Where can I refine gold-filled jewelry?
Many professional refining services can handle placer gold. Therefore, it's crucial to choose a reputable refiner to ensure you receive a fair assessment and payment for mined material. Always do your research before choosing a refiner, checking for things like length of time in business, availability of convenient locations, payment process and choices, reviews, and trade affiliations.