Big Tree Creek, Yacolt, Clark Co., Washington, USA
CaAl2Si6O16·5H2
This rare Zeolite is found in a vug in amgydule basalt. The color of the Epistiblite is white with a slight pink/orange tint. It is composed of small crystals with some faces having a good luster. The specimen has been glued to black styrofoam inside a perky box.