Essential Oils are the subtle, aromatic, and volatile liquids extracted from the leaves, stems, bark, seeds, flowers, and roots of herbs, shrubs, bushes, and trees through distillation. Essential oils are the fragrant essences of plants in their purest, most concentrated state and have been referred to by Ayurvedic medicine as liquid sun energy - a true gift from nature to be treasured and enjoyed for aromatic or healing purposes. 10 ml.