Rose oil the aromatics unaltered by heat. Because CO is gas at normal atmospheric pressure, it leaves no trace of itself in the final product. The equipment for CO extraction is expensive, which is reflected in the price of the essential oils obtained from the process. It takes a large amount of rose petals to distill a small amount of essential oil. Depending on extraction method and plant species, the typical yield can be approximately 1:3,000. To mitigate the cost, some dishonest dealers will dilute rose oil with geranium ("Pelargonium graveolens") or palmarosa ("Cymbopogon martinii") essential oils, both of which are rich
Attar of Nishapur of further products of his pen: He also states, in the introduction of the "Mukhtār-Nāma", that he destroyed the "Jawāhir-Nāma' and the "Šarḥ al-Qalb" with his own hand. Although the contemporary sources confirm only `Attar's authorship of the "Dīwān" and the "Manṭiq-uṭ-Ṭayr", there are no grounds for doubting the authenticity of the "Mukhtār-Nāma" and "Khusraw-Nāma" and their prefaces. One work is missing from these lists, namely the "Tadhkirat-ul-Awliyā", which was probably omitted because it is a prose work; its attribution to `Attar is scarcely open to question. In its introduction `Attar mentions three other works of his, including one entitled