ncat VHD7, Kidwellite, Beraunite, Coon Creek Mine, Polk Co., Arkansas, USA November 17, 2019 Steve Arkansas North and Central Americas United States TBA
Alabama North and Central Americas United States 2178 Strengite, Cacoxenite, Kidwellite, Rockbridgeite, Vivianite, Indian Mountain, Cherokee Co, Alabama, USA March 23, 2018
Australasia Australia South Australia ncat JP768 Kidwellite, Cyrilovite after Strengite, Iron Monarch open cut, Iron Knob, Middleback Range, Eyre Peninsula, South Australia September 23, 2019
Cornwall England United Kingdom ncat JP1248 Beraunite, Gravel Hill Mine (Cliff Iron Mine; Penhale Iron Mine), Perran Iron Lode (Great Perran Iron Lode), Perranzabuloe, Cornwall, England, UK October 8, 2019
