“Tiny courless crystals of cowlesite intergrowing to form typical, white, rounded aggregates. Associated likely with yellowish stilbite-subgroup species (or, maybe, saponite?) in a vug of a volcanic rock. Photo layer composing/stacking technique used.”

“Tiny courless crystals of cowlesite intergrowing to form typical, white, rounded aggregates. Associated likely with yellowish stilbite-subgroup species (or, maybe, saponite?) in a vug of a volcanic rock. Photo layer composing/stacking technique used.”