Gemologist (noun)

A specialist in gems, especially one trained to evaluate, cut, and sell gems and to identify gemstones by their physical and optical properties.

Origin:

From the french word gémologue, derived from greek word 'gēmē' meaning 'jewel' and 'logos' meaning 'science or study of'.

Examples:

1. The gemologist carefully examined the diamond under the microscope, determining its quality and value.
2. The gemologist was an expert in his field, with a deep knowledge of gems and the history of jewelry.
3. The gemologist was sought after by collectors and investors for his expertise in identifying rare and valuable gems.
4. The gemologist's work was both scientific and artistic, requiring a combination of technical skills and an eye for beauty.
5. The gemologist's store was a treasure trove of gems and jewelry, attracting customers from all over the world.