GEM

n. 1 gemstone, jewel, stone, precious or semiprecious stone The crown was set with rubies and other precious gems 2 ideal, quintessence, perfect example; pearl (of great price), marvel, flower, élite, cream, crème de la crème, pick, nonpareil, treasure, prize, masterpiece, chef-d'oeuvre This is a perfect gem of a painting The vale of Grasmere is a gem in the diadem of the Lake District.