KARAT Gold refers to a solid gold item (or gold alloy), either shaped or casted into form of jewelry or Bullion Bars & Coins. The karat...

Stannous chloride test solution is one of the most important tool and a most have for any precious metal recovery and refining process,...

When examining a Gold piece of KARAT jewelry, sometimes looking and identifying the gold jewelry Hallmarks is not enough. For this reason...

The Inquartation method is one of the most common methods of refining low and medium karat gold jewelry (9K-18K) and can also serve the...

4 - Gold precipitation with Sodium Metabisulfite. Now that we have our Gold solution (Chloroauric acid - HAuCl4) filtered and clean of...

Before we start, you should know that there is some dispute regarding a direct Aqua Regia (AR) refining process for high gold content...

5. Gold powder cleanup. The washing process is probably the most important one as it will remove the majority of contaminates that ha...

Before explaining how to perform this process, it's probably be better if we first talk about why use it in the first place. As you...