Emerald is the stone of secret knowledge. If the dream is accompanied by pleasurable feelings, it expresses the deep desire to acquire knowledge and achieve the gifts of clairvoyance. It can also foretell enjoying perfect eyesight to old age. If accompanied by feeling of anxiety or terror, it reflects the fear of revival of our bad instincts, especially if the emerald is accompanied by a sapphire. It can also foretell an eye disease.