The crude oil collected from gurjun tree (Popularly known as : KERUING TIMBER TREE Or Kayu Lagan) is naturally dark in appearance, hence known as gurjun dark. The crude oil can also be re-distilled to obtain gurjun light
Gurjun is primarily cultivated in the southeast asia region (Malay Peninsula, Sumatra, Borneo, the Philippines, Java, Bali, Lombok and Sumbawa). It is, however, important to note that the oils obtained from Gurjun trees in the the above listed countries have different constituents. The Indonesian variety of Gurjun oil has Alpha copaene (Min 40%) as it’s main component. The other quality from Malaysia/Vietnam/Cambodia is different as the main constituent is Gurjunene (Min 40%).