Bergamot essential oil is a cold-pressed essential oil produced by cells inside the rind of a bergamot orange fruit. It is a common top note in perfumes. Bergamot essential oil is a major component of the original Eau de Cologne composed by Farina at the beginning of 18th-century Germany.The first record of bergamot oil as fragrance ingredient is 1714, to be found in the Farina Archive in Cologne.One hundred bergamot oranges will yield about three ounces (85 grams) of bergamot oil. The scent of bergamot essential oil is similar to a sweet light orange peel oil with a floral note. Earl Grey tea  is a type of black tea that contains bergamot essential oil as a flavouring.ne hundred bergamot oranges will yield about three ounces (85 grams) of bergamot oil. The scent of bergamot essential oil is similar to a sweet light orange peel oil with a floral note.  Earl Grey tea  is a type of black tea that contains bergamot essential oil as a flavouring.