gem

The word 'gem' entered English in the 14th century from the Old French 'gemme', which meant a precious stone. This French term was borrowed directly from Latin 'gemma', a word with a fascinating semantic range meaning 'bud, eye (of a plant), jewel, precious stone'. The Latin meaning likely originated from the visual similarity between a swelling bud on a plant and a polished, rounded stone. Over time, the primary meaning in English narrowed to focus specifically on the precious stone, while the 'bud' sense faded. The figurative use to describe an excellent person or thing developed later, drawing on the inherent value and beauty associated with jewels.

The word 'gem' is a simplex word. It is a loanword from Old French, which itself derived from Latin 'gemma', meaning 'bud, jewel'. The Latin term is of uncertain origin, possibly from a Proto-Indo-European root.