I have inherited what I believe is a natural pearl graduated necklace of about 16". It is currently at a local jeweler's awaiting a visit from a certified appraiser. I'm nearly certain this necklace was purchased from Marcus & Co. in New York City in 1912. It has a clasp of 6 old mine cut diamonds. The first owner kept a diary that notes the day she received a pearl necklace the week prior to her 1912 debut when she was 18 and also a note that 2 pearls from a pin were added to the necklace. She was 18 at the time. Would any of this information make any difference to someone trying to appraise the piece? Thank you.