Ancient times, when natural oil was used for fragrance
Pure extract (Ruh) was being used for fragrance to get fragrance, but now due to high demand and labour intensive process Ruh or pure extract are costly (for example pure rose oil cost around 6 lakh INR per KG),
however in some plants due to high oil yield and more supply like for example ruh vetiver is comparatively less in cost (approx. 20-80 thousand per liter, depending on the quality)
Some religions follow the fragrance cycle based on the weather. For example, saffron, due to its warm nature, is preferred to be used in winter, and sandalwood in summer due to its cooling properties.

Pure extract (Ruh) was being used for fragrance to get fragrance, but now due to high demand and labour intensive process Ruh or pure extract are costly (for example pure rose oil cost around 6 lakh INR per KG),
however in some plants due to high oil yield and more supply like for example ruh vetiver is comparatively less in cost (approx. 20-80 thousand per liter, depending on the quality)
Some religions follow the fragrance cycle based on the weather. For example, saffron, due to its warm nature, is preferred to be used in winter, and sandalwood in summer due to its cooling properties.

Over the period of time, people identify method to capture or record the fragrance by passing fragrance through sandalwood oil (deg-bhapka method still alive in kannuaj india), Depending upon quality of roses and sandalwood oil, sandalwood distilled rose roughly cost around 5 to 12 lakh per liter.
This sandalwood distilled rose oil is traditionally known as rose attar
This sandalwood distilled rose oil is traditionally known as rose attar
CAUTION: In past when this method was introduced sandalwood was easily available and not that much costly, but now a days some distilleries use dioctyl phthalate or DOP instead of sandalwood oil for competitive pricing but remember DOP can cause skin diseases, hence if you are buying attar from some shop do enquire about it first

In modern perfumery, The fragrances (ruh) are studied in detail and their key constitutes are identified with help of techniques like principles of gas chromatography, now a perfumer roughly know that what aroma components to be added and in which ratio to have make the clone of natural oils (ruh).
This lab made combination which is very similar to natural oil but since its created in lab, it is called as real constitute original or RCO oil
For example, only sweet fragrance of rose (which majorly comes from geraniol) can be mixed with spicy fragrance from clove (which comes from eugenol) in appropriate ratio to create a desired fragrance or fine fragrance which does not even naturally exist in nature.
Such fine fragrance can be mixed with ethyl alcohol, which is thinner than water (to make it easily spreadable), to get spray perfume. some sellers mix this fine fragrance with carrier oil (like coconut oil or synthetic DPG oil) to make attar
