Ear jade jade bridge furnace fireSpecification: high 1.8 cm wide and 5.7 cm weighs 34.9 gJade one of these methods.Fire is a method of artificial coloring jade jade.Jade craft of artificial dyeing is very old, as long as there is a pursuit of jade color, as there is the possibility of artificial dyed jade.The Palace Museum has a belong to the neolithic jade, sundial ink brown, sleek like paint, originally from the section on the jade jade expected, the a layer of ink is not visible on the surface soil of ooze color, but artificial dyeing.