Stephen G. Bloom, who authored the 2009 ebook “Tears of Mermaids: The Secret Story of Pearls,” refers to the black pearl as “the renegade pearl, the a hundred and eighty-degree pearl, the alternative from the https://www.ebay.com/str/pacificpearlsinternational?mkcid=1&mkrid=711-53200-19255-0&siteid=0&campid=5339072282&customid=&toolid=10001&mkevt=1