South Sea cultured pearls: Large South Sea cultured pearls (around thirteen mm), farmed in Australia, Indonesia, along with the Philippines, variety in coloration from white to black. they could have a perfectly round https://www.ebay.com.au/str/pacificpearlsinternational?mkcid=1&mkrid=705-53470-19255-0&siteid=15&campid=5339072275&customid=&toolid=10001&mkevt=1