gemologist
/dʒɛˈmɑlədʒɪst/
noun
- A person who studies or works with precious stones (gems), especially one who can identify, grade, and appraise them.
- After years of study, she became a certified gemologist and opened her own jewelry store.
- The gemologist examined the diamond with a special magnifying glass to check its clarity.
- My aunt hired a gemologist to appraise her grandmother's ruby necklace.