I-Lutetium(III) Oxide(I-Lu2O3), eyaziwa nangokuthi i-lutecia, iqinile emhlophe kanye ne-cubic compound ye-lutetium. Iwumthombo we-Lutetium ongancibiliki kakhulu ngokushisa okushisayo, onokwakheka kwekristalu eyi-cubic futhi etholakala ngefomu lempushana emhlophe. Le oxide yensimbi yomhlaba eyivelakancane ibonisa izinto ezibonakalayo ezivumayo, njengendawo ephezulu yokuncibilika (engaba ngu-2400°C), ukuzinza kwesigaba, amandla emishini, ubulukhuni, ukuguquguquka okushisayo, nokwanda okuphansi kokushisa. Ifanele izingilazi ezikhethekile, izicelo ze-optic neze-ceramic. Ibuye isetshenziswe njengezinto ezibalulekile zokusetshenziswa kwamakristalu e-laser.