3493 Baddeleyite, Corundum, Biotite, Microcline, Bear Trap Deposit, Bozeman, Gallatin Co., Montana, USA October 3, 2019 Steve Montana North and Central Americas United States
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
California North and Central Americas United States 30002 Ruby, Cascade Canyon, San Bernadino Co., California October 5, 2019
