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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Chrysoprase: The Nickel-Coloured Chalcedony That Has Decorated Palaces and Cathedrals for Three Thousand Years

by Laura Konst

Chrysoprase is the most valued variety of Chalcedony, its distinctive bright apple-green produced not by iron or chromium as in most green minerals but by nickel, one of the rarer colour mechanisms in the silicate family. It has been used as a gemstone and decorative material for over three thousand years, worn by Alexander the Great, set into a fourteenth century Prague cathedral, and applied to the walls of a Prussian palace. This guide explores the nickel geology, the colour science, and the human history behind one of the mineral world's most enduring green gemstones.

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