4012 CRISTOBALITE, Black Rock, Black Rock Desert, Millard County, Utah, U.S.A. September 28, 2019 Steve North & Central Americas United States Utah Source R.Coulsell, 1999
Nevada North & Central Americas United States 4304 HEMIMORPHITE, Eureka Mine, Ruby Hill, Eureka County, Nevada, U.S.A. September 28, 2019
California North & Central Americas United States 2661 PROBERTITE, Borax Pit #3, Ryan, Inyo County, California, U.S.A. September 28, 2019
