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 This section is a good choice ! Send their elders , gratitude in my heart ; send love to give you a unique love ; send girlfriends , and would like to share with you OK ; send their unique personality and as I heart . Product Details - Shape / Type : Pendant / Charm - Material / Gemstone : Emerald / - Shipping / Handling : Standard international shipping ( 10-18 days delivery ) - 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 : green, icy varieties - Size: 52 * 38 * 6 mm or so - Weight ( g / CT): ~ ~ 48 g / 79 kt - Luster: vitreous luster - Surface texture : medium grain Introduction: Featured Wada material, diamond powder thousand polished . Jade uniform, nourish no crack , fine workmanship. Gifts atmosphere, factory new special promotions ! ! Fashion classic , unique personality, absolutely fantastic , not to be missed ! 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 by registered mail Thank you for reading , if you have any questions, please contact me.