Georgia (US) North and Central Americas United States 5562 Opal, Girard, Girard District, Burke Co., Georgia, USA October 5, 2019
North and Central Americas United States Utah 3654 Weeksite, Opal, Autunite No 8 Claim, Thomas Mountains, Juab Co, Utah, USA April 27, 2023
Cornwall England United Kingdom 3784 Opal, Posnjakite, Langite, South Wheal Basset, Redruth, Cornwall, England October 3, 2019
