The Crystal and Mineral Vault

Welcome to our Crystal and Mineral Knowledge Hub, where science tradition and mindful practice come together. This space is dedicated to exploring the formation properties and cultural associations of crystals and minerals through Mineral Vault profiles and practical guides designed to encourage informed discovery and deeper understanding.

Go to our Mineral Guides for science based knowledge and the 'How to Guides' for spiritual practices.

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Selenite: The Crystal That Grew to Eleven Metres Inside a Mexican Cave

by Laura Konst

Selenite is a crystalline variety of Gypsum, one of the Earth's most abundant evaporite minerals, and it holds a geological record that is hard to match: inside a flooded cave in Chihuahua, Mexico, Selenite crystals grew undisturbed for half a million years to reach eleven metres in length. This guide explores the formation, optical properties, Gypsum varieties, and the science behind why this soft, luminous mineral glows the way it does.

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