Yu is considered to help a person , but in contact with it . Yu said that to enhance the feeling of cool , purify thoughts, quiet the mind and induce a meditative state . It is also believed to cause frequent treatment jade stones become more beautiful sheen. According to the Chinese proverb , "Jade is cool because it comes from the nature of a clear mountain stream ." Science , said: " 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, he or she may be a darker shade of jade . If we 're lucky, the stone may be lighter shade . It is also considered a jade piece broken or damaged , it protects its holder from an evil and harmful events. Jade or " jade" in Chinese is also known as "Heaven Stone ." There are many nuances of green , but differ in white, black , gray, orange, yellow and purple hues shades , Jade is a precious stone for thousands of years in China to protect the power and healing quality requirements . It is also said to stimulate creativity and mental agility , and improve a person 's health. Product Details - Shape / Type: pendant peace buckle - Material / Gem : Jade / Jade - Manual : Yes - Condition: New - Level / Type : 100% A grade / A type / A level - Origin: China - Shipping / Handling : Standard international shipping ( 10-18 days for delivery ) - Refractive index: 1.66 - 1.69 - Specific gravity: 3.33 - 3.34 - Colors and varieties: green, icy varieties - Diameter : 23-25MM Thickness: 9 to 11mm - Weight (g / CT): ~ to 9g / 45 - Grassy Gloss: Gloss - Surface texture: medium grain - Condition: Excellent - Accessories: adjustable rope necklace Freight Policy According chargeable weight ( NW ) , transport / handle for charging , billing weight is listed in the item description , S / H ratio shown in the following table EMS: Express Mail Service, 4 - 8 days to the U.S., Canada, UK, Australia and other places , S / H fees and different other counties Standard Shipping: 10-18 days worldwide Pack 2 kg or less. Other countries S / H in the U.S. than in the cost of 2 kg bag of different Registered Mail ( free online tracking number $ 1.50 value ) All our packages are shipped by registered mail with online tracking number ( 150 value ) , 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 within 7 days to receive a full refund of the date of their return . No restocking fee will be charged .