7102 Tridymite, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany October 5, 2019 Steve Europe Germany ex Joan Lamond Collection
Australasia New Zealand 5055 Pseudobrookite, Hematite, Tridymite, Henderson’s Quarry, Mt Ngongathaha, Rotorua, New Zealand September 29, 2019
Co. Antrim Northern Ireland United Kingdom 4822 Tridymite, Tardree Mountain, Co. Antrim, Northern Ireland October 5, 2019
Europe Germany 2256 Cordierite, Mullite, Hematite, Tridymite, Bellerberg, Eifel Mountains, Germany September 22, 2019
Australasia Australia Victoria ncat JP2581 Tridymite, Magnetite, Rutile, Phlogopite, Hornblende, Spring Hill, Macedon Ranges, Victoria September 23, 2019