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.

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Carnelian: The Ancient World's Favourite Orange Gemstone

by Laura Konst

Carnelian has been carved, traded, and worn continuously for over five thousand years, travelling along the earliest known long-distance trade routes from India to Mesopotamia by 3000 BCE. Its orange to reddish-brown colour comes from fine-grained Hematite within a microcrystalline silica matrix, and most commercial material has been heat-treated by a method Indian lapidaries have used for four thousand years. This guide covers the colour chemistry, the heat treatment question, and one of the longest human relationships with any gemstone in the mineral world.

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