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 Product Details - Shape / Type: jade pendant / pendants Health Chaumat designate immediately sealed - Material / Gem: Jade / Fei Cui - Standard international shipping (10-18 days delivery shipping / handling) - 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 - 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 receive a full refund immediately and return them within 7 days. There is no restocking fee will be charged.