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Apophyllite is not a zeolite. Apophyllite is divided into three distinct species, fluorapophyllite, hydroxyapophyllite and natroapophyllite, depending on their chemical composition. It holds the high water content that infuse the capability to conduct electricity.
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Red Heulandite with miniature stilbite o matrix from Maharastra, India. Outstanding brick red heulandite with miniature bladed orange stilbite. A quality piece for collectors. Width: 120mm. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~.
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In its pure form, it is also referred to as Sard (colored with iron oxide) a green variety or Carnelian. Chalcedony is a form of Quartz in microcrystalline form. Chalcedony is made up of natural silicon dioxide.
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