The choice of N. gibbosulus in Mediterranean web pages and N. kraussianus is South African internet sites is actually a function in their availability inside the vicinity of the web-sites, but will not explain why this genus was most well-liked above other shells of comparable measurement and shape. A comparison https://medium.com/@spoilmevintagediy/the-rich-history-of-beadwork-a-journey-through-the-ages-4e4fd2e474cf