1. the science or study of gems and precious stones, including their identification, classification, and valuation
Usage: also spelled gemmology in British English; academic and professional field

Examples

• She earned a degree in gemology to become a certified diamond appraiser.
• Gemology requires knowledge of mineralogy, chemistry, and crystal structures.
• The museum hired a gemology expert to authenticate the ancient rubies in their collection.
• Modern gemology uses advanced technology like spectroscopy to identify synthetic gems.
• He studied gemology for five years before opening his own jewelry business.
• Gemology courses teach students how to grade diamonds using the four Cs: carat, cut, color, and clarity.