When it comes to analyzing the quality of gold, the term "gold assay samples" is commonly used. However, there are several synonyms to describe this process. "Gold testing samples" is one such term that can be used interchangeably. Other options include "bullion assay samples" and "gold purity samples." These terms all refer to the process of testing the quality and purity of gold samples, typically through chemical analysis. Whether it's referred to as gold assay samples or any of these synonyms, the practice is a crucial step in determining the value and credibility of gold, especially in the jewelry and investment industries.