LAWRENCE LAWRY / SCIENCE PHOTO LIBRARY LAWRENCE LAWRY / SCIENCE PHOTO LIBRARY
Cavansite on mordenite. Cavansite (calcium vanadium silicate) has a rich blue colour that arises from the hydrous nature of its crystals. Its relative rarity makes it a sought after collector's mineral. It is often associated with zeolite minerals such as mordenite (white), which consists of a mix of aluminosilicates.
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