Heulandite Mineral Specimen - India ~ 8.7 oz 4" x 3" Approx Heulandite is a hydrated sodium and calcium aluminosilicate mineral belonging to the zeolite family. It's known for its coffin-shaped crystals, often found in various shades of white, red, gray, or brown. Heulandite's structure allows for cation exchange, making it useful in water softening. It's commonly found with other zeolites in basalt cavities and other geological formations. ** SEE VIDEO ( IF AVAILABLE ) FOR FULL EFFECTS ** ** WE HAVE MANY BEAUTIFUL MINERALSPECIMENS FROM THE USA AROUND THE GLOBE ** MOST ARE FROM OUR VARIOUS TRIPS ** ** SEE MY STORE ** ** OUR GOAL IS TO MAKE COLLECTING FUN AFFORDABLE FOR ALL WITH GREAT LOW PRICING * ITEM # 311