Our payment is expected within 5 days of auction end. If payment is not received ,your item may be re-listed. If you want certificate, Please contact us before we ship the stone. No Questions Asked, 100% money back guarantee without any restocking fees if dissatisfied. Item (s) have to be returned for a refund within 7 days after receiving it and must be returned in theiroriginal, Damaged goods will not be accepted and will be returned to the sender.For International Buyers, Before Open Dispute Cases of Returns and Not Receiving The Packet OR Leaving Any Negative Feedback Please E-Mail me We Will Do Our Best To Satisfy You Through Our Services. Once You Received Our Products & If you Like Our Products Then Please Leave us a Positive Feedback. We Hope For a Best Business In Coming Futur.