Hi, I am new to this forum, as I have recently acquired some fabulous South Sea Pearls. I purchased these from a good friend for a bit of money, but nowhere what they appraise for. As a matter of fact, my jeweler is having a difficult time finding a value of these due to their exceptional quality and size. This strand is 17” and the 25 pearls range from 15-16mm with only 3-4 pearls with one little flea bite/dimple/blemish on them, and a platinum/diamond clasp. They were purchased years ago, maybe a couple of decades ago in Greece from Stavros Papadopoulos. I cannot find any info on this jeweler. In any case, I want to store them in my safe, but it is air tight. This winter where the safe is, the temps went below freezing for quite a few days. Is this ok for these pearls? I got nervous and took them out and brought them into the house. We live in a dry climate, so what would be the best way to store them So they do not dry out? And, should they be kept in velvet, silk, cotton or??? I want to keep them beautiful and as pristine as they are for my daughter and grandaughter. In addition, how many years would it take for pearls of this size to grow? Just being super curious..thank you in advance!