What does the word gem mean

i ahve to use it in a sentence

Thank you for using the Jiskha Homework Help Forum. When you need the definition of a word, don't forget a good dictionary:

Main Entry: [1]gem
Pronunciation: 'jem
Function: noun
Etymology: Middle English gemme, from Middle French, from Latin gemma bud, gem
Date: 14th century
1 a : JEWEL b : a precious or sometimes semiprecious stone cut and polished for ornament
2 a : something prized especially for great beauty or perfection b : a highly prized or well-beloved person
3 : MUFFIN

To use it in a sentence, select a synonym you do know (jewel, for example) and use that in a sentence first, then substituting the new word.