Aluminiyamu Oxidi (Al2O3)ndi chinthu choyera kapena pafupifupi chopanda mtundu cha crystalline, ndi mankhwala a aluminiyamu ndi mpweya. Amapangidwa kuchokera ku bauxite ndipo nthawi zambiri amatchedwa aluminiyamu ndipo amathanso kutchedwa aloxide, aloxite, kapena alundum kutengera mawonekedwe kapena ntchito zina. Al2O3 ndiyofunikira pakugwiritsa ntchito kwake kupanga zitsulo za aluminiyamu, monga chotupa chifukwa cha kuuma kwake, komanso ngati chinthu chotsutsana chifukwa cha kusungunuka kwake kwakukulu.