We guarantee the authenticity of the item, which has been authenticated. Price negotiations are only accepted with a [firm offer]. Some items are not subject to price reduction. Size: Size 16 Main Stone: Diamond [Authenticity Guarantee] In the unlikely event that the item is determined to be a fake, you can return it with peace of mind. High-value items will have a protection tag attached to prevent swapping. Returns cannot be accepted if the tag is removed. Management ID: B511