Hi! I am brand new to this forum and I love pearls!!! I would like to add to my collection. I have a question regarding my pearls. I purchased two strands of Tiffany pearls about 15 years ago. One strand is 7.5-8mm 18 inch akoya pearls with the 18kt signature clasp. The second strand are Schlumberger 8-8.5 17.5 inch akoya pearls with the 18kt and Pearl ""bird in a nest" clasp. Honestly I am not sure I am remembering the clasp name accurately. Both of the strands were Tiffany top of the line akoyas. Can anyone tell me if they are AAA grade or something else. I purchased them new from Tiffany, not through a private seller. Thanks.