7102 Tridymite, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany October 5, 2019 Steve Europe Germany ex Joan Lamond Collection
New Mexico North and Central Americas United States 5789 Tridymite, Truth or Consequences, Sierra County, New Mexico, USA July 18, 2022
New Mexico North and Central Americas United States 5787 Tridymite, Titanite, “Pyrobole”, Animas Creek, Caballo, Sierra Co., New Mexico, USA July 18, 2022
Australasia New Zealand 3036 Hematite, Phlogopite, Augite, Tridymite, Henderson’s Quarry, Mt Ngongotaha, near Rotorua, North Island, New Zealand October 3, 2019