5061 Corundum, Luc Yen, Yen Bai Province, Vietnam September 29, 2019 Steve Asia Vietnam Blue Sapphires
Montana North and Central Americas United States 10020 Corundum, Bozeman Corundum Mine, Gallatin Gateway, Montana November 16, 2018
Africa Madagascar ncat JP3061 Corundum var Ruby, Ampanihy District, Atsimo-Andrefana Region, Tulear Province (Toliara), Madagascar October 8, 2019
