Ecodrop's Citrus Nobilis essential oil is cold-pressed from the peels of unripened mandarin fruit known as Green Mandarin. The aroma of unripened peel is sweeter and less sour. General Information Mandarin essential oils can come in the form of two types. Green Mandarin Essential Oil which is made from cold pressing the younger fruit has a higher acidity. This makes the Green oil great for cleaning products. Green Mandarin is not photosensitive (Unlike other citrus oils), therefore safe to apply when going under the sun. A super uplifting aroma that can help in soothing nervous tension and irritations when diffused.