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 considered to cause frequenthandlingofjade more beautiful gloss stone growth. 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 anonymous conductors. 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. Product Details - Shape / Type : Pendant / Charm - Material / Gem : Sapphire - Shipping / Handling : Standard international shipping ( 10-18 days for delivery ) - Level / Type : 100 A / A type / A level - Origin: China - Refractive index: 1.66 - 1.67 - Size: about 58 * 38 * 7mm - 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 Thank you for visiting my shop .