Yu is considered to help a person, but in contact with it. Yu said that to enhance the feeling of cool and purify the thoughts, quiet the mind and induce meditative state. It is also believed to cause frequent handling of jade stones grow more beautiful luster. According to a Chinese proverb, "Jade is cool because it comes from the essence of a clear mountain stream." Science "says Jade is a cool feeling, because it is a non-conductor. Many Chinese people believe that a jade stone eventually become a part of life, its owner. Yu said that change color depending on its own aura. Or depressed when he or she may be a darker shade of jade. If we are lucky, the stone may be lighter shades. A jade piece cracks or breaks, the shield of its holders from an evil, it is also considered Product Details - Shape / Type: Ring / Charm - Material / Gem: Jade / Fei Cui - Standard international shipping (10-18 days delivery shipping / handling) - Level / Type: 100 A / A type / A type - Country of Origin: China - Refractive index: 1.66 - 1.67 - Specific gravity: 3.33 - 3.34 - Colors and varieties are: gray, cold varieties - Weight (g / CT): ~ ~ 4.5 g / 13 kt - Luster: vitreous luster - Surface texture: medium grain - Condition: Excellent Shipping Policy According chargeable weight (NW), transport / handle is to be charged, chargeable weight is listed in the item description, S / H rates are listed in the chart below EMS: Express Mail Service,4-8 days to USA, Canada, UK, Australia and other places, S / H charges, other counties different Standard International Shipping: Global 10-18 days package 2kg or less. S / H in the United States than in other countries different from 2 kg bag fee Registered mail (free online tracking number) All of our package will be shipped with online tracking number by registered mail, I'm sorry, we do not send packages unregistered. 100% Satisfaction Guaranteed If you are not completely satisfied with our products, please email us immediately and return them within 7 days of the date you receive them for a full refund. No restocking fee will be charged.