礦物資料庫與水晶療法礦物UreaDavid Hospital·CC BY 4.0·WikimediaUreaCO(NH2)2 IMA approved成分Composizione (% in peso)NOCHNNitrogen46.7%OOxygen26.6%CCarbon20.0%HHydrogen6.7%詞源命名來源 urine.