(noun)

1. An expert in assessing or analyzing the purity and composition of metals or minerals.

Example: The assayer conducted various tests to determine the gold content in the sample.

Example: The assayer's accurate assessment of the diamond's quality confirmed its value.

(noun)

2. A person responsible for evaluating the worth or quality of something.

Example: The antique assayer examined the painting to determine its authenticity.

Example: As an assayer of wines, he had developed a discerning palate for detecting flavors.