Jade is believed to be able to help a person in contact with it . Jade cool feeling , is said to enhance and purify the mind , calm the mind and induce meditative state. It is also believed that jade frequent handling can cause the stone to grow more beautiful luster . According to a Chinese proverb , "Jade is cool because it is clear from the nature of the mountain ." Science says , jade is a cool feeling, because it is a non- conductor . Many Chinese people believe that a jade stone eventually become part of the life of its owner . Jade is said to be based on their share of the aura to change the color . When he or she is down or depressed may be a darker shade of jade . If we are lucky , the stone may be a lighter hue. It is also believed that when a jade piece cracks or breaks, it has an evil shielded from its holder Product Details - Shape / Type : Ring / Charm - Material / Gem : Jade / Jade - Standard international shipping ( 10-18 days for delivery ) - Level / Type : 100 A / A type / A level - Origin: China - Refractive index: 1.66 - 1.67 - Specific gravity: 3.33 - 3.34 - Colors and varieties: green color , Icy varieties - Weight (g / ct ) : ~ 14.9 g / 74.3 kt - Luster: vitreous luster - Surface texture : medium grain - Condition: Excellent Freight Policy Shipping / handle fee is based on chargeable weight ( not net) fee , chargeable weight is listed in item description above , S / H rate tables listed below Different courier mail service , 4-8 days to USA, Canada, UK, Australia , S / H fees and other counties : EMS Standard international shipping : within 10-18 days worldwide below 2kg package. S / H fee package over 2 kg in other countries different than the U.S. Registered Mail ( free online tracking number ) All our packages will be shipped by registered mail with online tracking number , I'm sorry , we do not send packages unregistered . 100% Satisfaction Guaranteed If you are not completely satisfied with our products , please email us and receive a full refund within seven days from the date of your return . No restocking fee will be charged .