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. Product Details - Shape / Type : Pendant / Charm Buddha - Material / Gemstone : Emerald / - Shipping / Handling : Standard international shipping ( 10-18 days delivery ) - Level / Model : 100 A / A / A grade - Country of Origin: China - Color: Green , Icy choice - Weight ( g / CT): ~ 2.6 g / 13 kt Shipping Policy Standard international shipping :10- 18 days to deliver to you Yes, we provide tracking number , so you can keep track of all the information . Registered mail All of our packages with online tracking number will be shipped by registered mail Thank you for reading , if you have any questions, please contact me.