Eight knife - ancient jade jade cicadaSpecification: length 7.6 cm width 3.4 cm thick 0.8 cm weighs 30.9 gEight knife jade cicada, knife work clean, hetian jade, white chicken bone calcification show, rust ooze depth."Eight knife" representative works for eight knife cicada, its divided into cicadas, cicada and crown "cure" ( cicada), eight knife cicada form usually with concise line, abstract the performance of its morphological characteristics, its characteristic is every line is straight, like a knife cut,monly known as "eight knife", the "eight knife" said with a few knives, can be brought into the jade cicada full of vitality.