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 . A jade piece cracked or broken, its holder from a wicked shield, it is also considered Product Details - Shape / Type: jade pendant / pendants zodiac Monkey - Material / Gem : Jade / Jade - Standard international shipping ( 10-18 days delivery shipping / handling ) - Level / Type : 100 A / A type / A type - Origin: China - Refractive index: 1.66 - 1.67 - Specific gravity: 3.33 - 3.34 - Colors and varieties: white , cold varieties - Weight (g / CT): ~ ~ 2.6 g / 13 kt - Luster: vitreous luster - Surface texture: medium grain If you are not completely satisfied with our products , please send us an email and get a full refund immediately and return them within 7 days . There is no restocking fee will be charged .