This is a complete and well-structured process for extracting gold from rocks and soil using aqua regia. Stages of Gold Extraction from Rocks and Soil Using Aqua Regia: 1. Grinding the Stones Start by grinding the gold-bearing rocks or soil until you obtain a fine powder. 2.Screening the Soil: Sieve the material to separate fine particles from larger impurities. 3. Roasting: Roast the powder to remove organic and sulfuric materials, making it easier to dissolve the gold later. 4. Dissolving Gold

2.1M views · 5.9K reactions | How to Gold refining pure gold precipitates. If you're precipitating using sodium metabisulfite: Add 1 ounce (about 1-1/2 tablespoons) for every ounce of dissolved metal in solution. This should be done out-of-doors because the vapors from the bisulfite are corrosive. No matter how good your ventilation system is, it is unlikely to be good enough when using this compound. #puregold #Aquaregia #gold | Archimedes Channel | Facebook