
What is the ping test for gold?
Excuse me, could you please elaborate on the concept of a "ping test" for gold? I'm not familiar with this term and I'm curious to know how it's used in the context of gold verification or assessment. Is it a specific method or tool employed by professionals in the industry to authenticate the purity or quality of gold? If so, could you provide some details on how it works and what it's intended to measure? Thank you in advance for your clarification.
