California North and Central Americas United States 30037 Djurleite, Neptunite, California State Gem Mine, New Idria District, San Benito Co., California, USA October 5, 2019
Africa Namibia ncat JP1412 Neptunite, Makatite, Microcline, Aris Quarries (Ariskop Quarry; Railway Quarry), Aris, Windhoek District, Khomas Region, Namibia October 8, 2019
California North and Central Americas Type Locality United States ncat JR3 Benitoite, Neptunite, California State Gem Mine, Santa Rita Peak, San Benito County, California, USA January 11, 2024
California North and Central Americas United States 0582 Neptunite, Dallas gem mine, San Benito Co., California, USA April 27, 2023
