As anyone who has worked with gold, silver, platinum and the like can tell you, assaying is the most vital step in the refining process. The laboratory is also the place where mistakes are most often made. At San Diego Refining, we have more than 50 years of experience in gravimetric precious metals analysis, and everything we process is double and triple checked for accuracy.

Fire assaying is the standard of all precious metals analysis. While we make good use of electronic testing, i.e. x-ray analysis, and feel that it is a useful tool in approximating results, true gravimetric analysis is a far more accurate measure of precious metals in almost any type of material.

In addition to performing assays on lots we are processing, we are available to analyze any type of material for a fee. Feel free to call or e-mail us with any questions.