Tetragonal
Three axes at right angles — one differs in length.
6 minerals in collection

Minerals of the Tetragonal system

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Clear apophyllite crystals with pyramidal terminations from India.
Apophyllite & Stilbite
Hausmannite on Manganite & Calcite
Hausmannite on Manganite & Calcite
Scapolite
Scapolite
Stannite Arsenopyrite and Quartz
Stannite Arsenopyrite and Quartz
Vesuvianite
Vesuvianite
Wulfenite Pseudocubic, Mimetite & Calcite
Wulfenite Pseudocubic, Mimetite & Calcite