Great South Gems & Minerals

• Zeolites • 
(India)

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• Zeolites • 

zeoilte - heulandite - prehnite - apophyllite - stilbite - calcite

The zeolites are a popular group of minerals for collectors and an important group of minerals for industrial and other purposes. They combine rarity, beauty, complexity and unique crystal habits. Typically forming in the cavities, or vesicles, of volcanic rocks, zeolites are the result of very low grade metamorphism. Some form from just subtle amounts of heat and pressure and can just barely be called metamorphic while others are found in obviously metamorphic regimes.

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Zeolites are hydrated aluminosilicates of the alkaline and alkaline-earth metals. About 40 natural zeolites have been identified during the past 200 years; the most common are analcime, chabazite, clinoptilolite, erionite, ferrierite, heulandite, laumontite, mordenite, and phillipsite.

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For further reading on ZEOLITES see: en.wikipedia.org/wiki/Zeolite and www.mindat.org/min-4395.html

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