Having been bitten buy the pearl bug with my estate sale finds, I tried ebay. This is a 30.75" strand. Seller listed as 7mm, seems about right to me just using a ruler. Seller says she bought it in NYC in the 80s. The clasp is 14k. I've never seen a clasp like this before. The pearls are dirty but seem to have great lustre. What do you think of the quality?