The Buddha is shown seated in Vajrasana on a lotus seat. Both his hands make the gesture of Dharmachakra-pravartana. He is wearing a sanghati, covering both the shoulders. The border of the drapery has an intricate chased floral design. His hair, painted in blue color, is arranged in small tight curls with a prominent ushnisha and a "jewel" on the top. His beautiful face has upturned lips painted in red color, and an urna between the eyebrows. The earlobes are elongated. His neck has three folds (trivali), one of the Mahapurusalakshanas.
This description by Dr. Shailendra Kumar Verma, Ph.D. His doctorate thesis being on the "Emergence and Evolution of the Buddha Image (from its inception to 8th century A.D).
A. Getty, The Gods of Northern Buddhism, Tokyo, 1962
A.K. Gordon, The Iconography of Tibetan Lamaism, New York, 1939
A. Waddell, Buddhism and Lamaism of Tibet, New Delhi, 1979
D.L. Snellgrove, The Images of the Buddha, New Delhi, 1978