This diamond's clarity is SI2. Please feel free to contact our professional jewelers for any questions you may have. Our contact info can be found on our storefront. This diamond has not been treated. Our customers come in all sizes. Therefore, our rings can be resized from size H 1/2 to R 1/2 for free after purchase. Upon purchase, the customer will be contacted by email regarding the sizing. All tax fees and import duties are included in the price of this item.