The causes of colour of untreated and heat treated padparadscha from Sri Lanka are compared with the colouration of beryllium diffusion treated samples from Ilakaka, Madagascar, and from Songea, Tanzania. 對來自斯裡蘭卡的未処理和熱処理帕帕拉恰藍寶石的顔色成因與來自馬達加斯加 Ilakaka和坦桑尼亞Songea的Be擴散処理藍寶石的顔色成因進行了對比。