Usually people jade product quality grading is based on the production process, and some jade plant will be divided into primary, secondary and tertiary products, some will jade products into premium products, superior grade, first grade, Second Grade four levels, different grades and levels can correspond to each other, my personal view is to be divided into three levels of jade treasures, works and general jade works, general jade jade works also classified according to species, each category is based on the choice of materials, shapes, cut work, polishing demarcated areas can be broadly divided into a general goods jade products, two products, three products at three levels. Jade jadeite and nephrite minor has two kinds. Nephrite have become happy lovers and antique collectors treasures of jade; jadeite is a city trail saw jade jewelry. How to distinguish quality jadeite, experts supply five simple way: see color: the color is the most important factor to assess the quality jadeite. No color of jade, just a stone Bale. Achieve uniform color, sun, strong, positive for the top grade. Uniform is the average; Yang refers to the color of clear, giving cheerful, no sense of stagnation; concentration refers to the color of deep enough; just means that no other Stern. Look Texture: jadeite is polycrystalline silicate mineral is composed of high-warm high pressure, the size of the crystals composing, will indirectly affect the extent to Britain at the end of creamy figured after the degree of transparency and colors. Thus, the more sophisticated layout polycrystalline, jadeite texture better. Lightness: transparency of the texture fetch is jadeite complementary physical phenomena, like the degree of permeability jadeite glass, its precise extent of the crystal, the light can shine without song. Look Acquired Processing: Processing fade completely without any bleaching or dyeing jadeite disposal as "A" grade, the highest value; bleached faded jadeite as "B" grade, followed by value; dyed jadeite as "C" grade lower value. Look crack: Once you have cracks on its non-texture, color and transparency of the how well the value of urban influence. Jade stores on the market a lot, jade nephrite and jadeite are generally divided into two categories. Also known as jadeite jade. From the chemical industry composition, the soft jade is calcium, magnesium and iron silicate; jadeite is sodium and aluminum silicate. Here are the pros and cons of jade, true and false identification methods: water identification method will be a drop of water drops in the jade, such as dew-like spread those long-suppressed truth jade; droplets disappear soon is the shoddy goods. Hand touch method if true jade hand touch, a cold sense of lubrication. Jade inspection method towards a bright place, such as sunlight, lighting Department, if the color clear, green uniform distribution is true jade. Tongue tongue lick lick method really have a dry sense of jade; and fake jade no astringent feeling. Magnifying glass will buy jade placed under the magnifying glass to watch, mainly whether the cracks, no cracks were for the superior quality jade, there are cracks were for the second. Even the real jade, there are cracks in its value is also greatly reduced, the more the more obvious cracks, the lower the value. Be creative pieces of jade, jade overall design according to the nature, form, color, amount of material drawn, so cut out to lock because of dirty material Shi Yi, jade pieces obviously dirty parts without lock. Some can not give people the natural beauty of jade shaped body to pay attention to break. Jade pieces to be beautiful styling, natural, vivid, real, proper proportion. Overall composition rational layout, the rules must be infrequent and are structured, a prominent theme. To meticulous workmanship, Omo smooth, neat little place, stacked digging, rolling hook, contradict must meet the requirements of a certain depth. Jade moist flat surface to be bright, uniform size of the place, do not lose shape modeling, wax evenly over the surface without green powder and other dirt. Wooden seat and product size ratio to the right, coordinated patterns, patterns and meticulous neat, clean and neat. Off the nest tight smooth, strong adhesion. Bright paint wooden seat, no heap paint and paint flow pitting. Pressure on gold, silver wooden seat depends on the pressure wire technology is good, is solid. Kam box should be nice, do not collapse cover, do not go type, the right size, surface cleaning. In addition to the above factors Muxia look outside, but also of wood and craftsmanship. Jade pieces of packaging in terms of kit to fit, to protect the work. Contact: Yujing Li Tel: 4006156603 Website: http: //www.yucunyuye.com Address: Nanyang City Tianguan Li River Logistics Park Avenue in the middle