Aoki's gems is based within Beijing China.We will always answer your message within 24hrs of receiving them.Independant Gem Certificates can be obtained by us from the Hong Kong IGI for a price of $45-55 per piece or Beijing NGTC for a price of $20-25 per piece. This is their direct charge and it usually takes 3-4 weeks from ordering. We have clients from all Countries and offer a very fast dispatch service world-wide. We sell wholesale to industry professionals and collector-investors alike.If, for any reason a gem is not suitable to you that you receive from us, you are welcome within 14 days to simply pop it back into stock here. Gems sold at Auction can be exchanged for the same value, whilst Gems with a buy-it-now price qualify for cash refunds (excluding shipping expenses).We aim to supply a range of beautiful material of all prices that is highly collectible and worthwhile. We welcome comments and suggestions about how we can improve our service to you.Thank you for visiting our store.