I picked up these 2 necklaces at an estate auction on line. They both feel gritty and are cold to touch. Both have 10k white gold clasps. The one with a tag that says international cultured pearls of nobility is only knotted between the last 4 pearls at end. Second necklace is knotted between each pearl and pearls are a little bigger and necklace is almost 19 inches long including the clasp. I am thinking that they could be Akoya because they look round and have a nice luster but maybe just nice sets of freshwater? I’m just too inexperienced to be able to tell the difference? I’m going to keep watching your videos, looking at pics and reading your posts. Thank you so much for sharing your knowledge here on Pearl -Guide.