They cheat with their customers, I returned my the ring for resizing for which I paid almost 400+ GBP and ended up with they changed the center stone with a low grade center stone. as per my original Certificate of Authentication my original stone was of these below specific value Orignal Center Stone properties Clarity:AAAA (this represent 100% Flawless) Colour: H After resizing the Center Stone properties are Clarity:VS Colour: G As per their expaination By Andy Miller 'G' is equal to 'old H' and there is no explaination how AAAA is equalvalent to VS. non of there products has a genuine hallmark which specifies that they are following any standard as per market.