Agarwood or Oudh is an exotic and expensive wood resin created when the Southeast Asian Aquilaria tree is attacked by a certain type of mold. The richly fragrant resin, which the tree produces in its core to fight off the infecting mold, has been harvested from affected trees for centuriesand used for incense and perfume oil.The "Wood of the Gods" has been traded and highly appreciated for thousands of years. Resinous wood is used as incense, for medicinal purposes, and pure resin in distilled form is used as perfume and perfume component. The oil of Oudh, whether extracted by distillation from wood, or by melting the raisin, is non-irritating and can be applied directly on the skin, or added in a perfume composition, most often as a base note.Its value is estimated as 1.5 times of the value of gold, and it is sometimes referred to as 'liquid gold'.An 80-year-old Aquilaria tree can yield 6-9 kg of agarwood oil. The resin compound in agarwood oil id detected by GC-MS method. Some main chemical compound of agarwood oils are A garol, A garospiral, Eudesmol, Jinkihol-eremol, Guaiol, Selinene, 2- (2-phenylethyl) chromon.Oil extracted from agarwood is used in Arabian countries as a perfume. Another thing that has its mark on the distillation of the oil is the age of the tree. The more the oil aged, the better it will smell.

Rose oil, meaning either rose otto (attar of rose, attar of roses), is the essential oil extracted from the petals of various types of rose. Rose ottos are extracted through steam distillation, while rose absolutes are obtained through extraction or supercritical carbon dioxide extraction, with the absolute being used more commonly in perfumery. Even with their high price and the advent of organic synthesis, rose oils are still perhaps the most widely used essential oil in perfumery.The macro compounds passed by GC in rose oil are Citronelol 17-45%, Giraneol 12-27%, Nerol 5-15%, Bound Alchohals 2-4.7%, Free alcohol 6.9-7.5%, N-paraphinic hydrocarbons 14 -33%.The key flavor compounds that contribute to the distinctive scent of rose oil, however, are beta-damascenone, beta-damascone, beta-ionone, and rose oxide. Beta-damascenonepresence and quantity is considered as the marker for the quality of rose oil.Due to the labor-intensive production process and the low content of oil in the rose blooms, rose oil commands a very high price. Harvesting of flowers is done by hand in the morning before sunrise and material is distilled the same day. There are three main methods for extracting the rose oil –Steam distillation, Solvent extraction and Supercritical carbon dioxide extraction.

Sandalwood oil is an essential oil obtained from the steam distillation of chips and billets cut from the heartwood of the sandalwood(Santalum album) tree. The best sandal wood oil of history is distilled from the sandalwood tree of India and Indonesia but again the best coming from Mysore, India. Sandalwood is an evergreen, parasitic tree that burrows its roots into other trees. It can grow up to 9 meters (30 feet) high and has a brown-gray trunk, many smooth slender branches, leathery leaves and small pink-purple flowers. Sandalwood oil is used in perfumes, cosmetics, and sacred unguents. Sandalwood oil contains more than 90% sesquiterpenic alcohols of which 50-60% is the tricyclic α-santalol. β-Santalol comprises 20-25%. Sandalwood essential oil is used in Ayurvedic medicine for the treatment of both somatic and mental disorders. Sandalwood is much in demand as incense and has a calming effect during meditation. The price of this very fine oil toosore and become one of the most expensive essential oils on the market. It appears as a principal ingredient in over 50% of all women's quality perfumes and some 30% of men's fragrances. The early Arab perfume makers used sandal wood mainly in pulverized or sawdust from as a base for solid perfumes and incenses.

The Frankincense (Boswellia Serrata) tree originates in central India. It is also known as Olibanum. Frankincense resin begins as a milky-white sticky liquid that flows from the trunk of the tree when it's cut, healing the wound. The resin is then distilled producing the precious oil. The Color of frankincense oil is Colorless to pale yellow clear liquid. It is obtained from resin by Steam Distilled Extraction Method. The anti-inflammatory property of this oil is reputed to be an effective treatment for joint pain and arthritis. Frankincense can also be used as an insect repellent and is also widely used in cosmetics and soap manufacturing. It has a grounding aroma, and often used in meditation. Frankincense Essential Oil has a rich woody, earthy scent with a deeply mysterious nuance. Frankincense Essential Oil is non-toxic, non-irritant and non-sensitizing. The main constituent is Alpha thujene.