I'm looking to purchase my wife a Tahitian pearl necklace for her 40th birthday especially since our honeymoon was in Bora Bora many years ago. I've been comparing necklaces between American Pearl (AP) and Pearl Paradise (PP) on the internet since they both seem reputable. (If they are not, let me know.) The questions that I have is whether the grades between the 2 are comparable? For example, if AP states that a strand is AAA, is that comparable to an AAA strand from PP? Or is PP more rigorous in their grading standards? Also, if either vendor states that the pearls are AA+ or AAA quality, are they really that high quality or is there grade inflation going on? Thanks in advance!