Product Details - Shape / Type : Ring / Charm - Material / Gem : Obsidian - 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: black , cold varieties - Size : ~ 24 * 15mm - 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 (before ) fee , chargeable weight is the speed of the item description listed above , S / H table listed below Different courier mail service , the U.S., Canada, UK, Australia , S / H fee and 4-8 days to other counties : EMS Standard international shipping : within 10-18 days worldwide 2kg less packaging . S / H packaging costs more than 200 kilograms , different than the United States and other countries Registered ( free online tracking number ) All of our package will be shipped via 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 send us an email and received within seven days from the date of your return for a full refund . No restocking fee will be charged .