Neolithic: hetian jade jade CV 2119 cm in diameter, 0.8 cm thick, weighs 461 gThe CV 21 hetian jade texture, have brown ooze, flat round, the central hole, light, no lines, grind the best.Outer isometric three consequent rotation teeth, carve ACTS the role of saw teeth between the two teeth, well-preserved.Jade of primitive simplicity and elegant, the abstract but abound change.