Stilbite
STILBITE
Stilbite Formula: Stilbite-Ca: NaCa4(Si27Al9)O72·28(H2O) Stilbite-Na: Na9(Si27Al9)O72·28(H2O)
Stilbite is a sodium calcium hydrous aluminum silicate that is a member of the family. This mineral crystallizes in the form of thin flattened plates, tabular crystals, as well as aggregates. It is commonly found in association with Apophyllite and Heulandite within basalt and other volcanic rock.
Stilbite is abundant in the volcanic rocks of Iceland, Faroe Islands, Isle of Skye, Bay of Fundy, Nova Scotia (where it is the provincial mineral), northern New Jersey and North Carolina.
