Mordenite

hydrated calcium potassium sodium aluminum silicate
(Ca, Na₂, K₂)Al₂Si₁₀O₂₄·7H₂O

Mordenite on Basalt Matrix

Mordenite on Basalt Matrix
Wolf Creek Pass, Colorado
Collected on 8 Oct 2008

Closeup of Mordenite Crystals

Closeup of Mordenite Crystals
Wolf Creek Pass, Colorado
Collected on 8 Oct 2008