Description
Cavansite is a deep blue hydrous calcium vanadium phyllosilicate mineral, occurring as a secondary mineral in variety of zeolite minerals.
Heulandite is a mineral series from the Zeolite group. The Crystals have a coffin-shaped habit but may also form simple rhombic prisms. The mineral is usually colorless or white but may have orange, brown, yellow, brick-red or green inclusions due to a Celadonite content.
