A thumbnail sized "grossular-like" chain of analcimes, I was told it from a small find in 2008, located in Cyclopean Islands, Metropolitan City of Catania, Sicily, Italy, where it is first described. It's one of the most common examples of a mineral with different symmetrics and space groups. Surprisingly, it's crystal system crosses cubic, uniaxial and biaxial, changes at different temperature ranges.

Zeolite is not my most pronounced mineral (sorry zeolites🥹) probably because they are too common and too complexity to study. However, this is one of the few zeolite minerals that in my collection due to it's special looking and gemmy quality.

Jeff Scovil Photo