7155 Cristobalite, Caspar quarry, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany
ex Joan Lamond Collection. White crystals. Other species present but not identified (tridymite?, enstatite?, phlogopite?).
Fluorvarulite not a species – unknown what this is.
5613 Cristobalite and sanidine in obsidian, Roadcut Section, Poihipi Road, Taupo District, Waikato Region, North Island, New Zealand. Photo width 5mm. Stack of 80 shots.