Geode Geodes form from expansion of an initial cavity filled with fluid, often a salt solution. Chalcedony, from silica gel, then forms on the edges of the cavity. This isolates the salt solution

Wall Art and Photo Gifts from Ardea

Geode Geodes form from expansion of an initial cavity filled with fluid, often a salt solution. Chalcedony, from silica gel, then forms on the edges of the cavity. This isolates the salt solution

DH-4393
Geode
Near Well 23 Canning Stock Route a very remote part of Western Australia.
Geodes form from expansion of an initial cavity filled with fluid, often a salt solution. Chalcedony, from silica gel, then forms on the edges of the cavity. This isolates the salt solution. If the surrounding water is less salty, then the internal salinity, though osmosis, creates outward directed pressure and the geode expands until equilibrium is reached. Crystallisation and dehydration of the silica gel leads to cracking, and sometimes, to entry of mineral-bearing fluids. These fluids may precipitate minerals leading to geodes which are completely crystallised (infilled with crystals). Sometimes, the term geode is applied to any spherical cavity within rocks, but strictly speaking, it should only be applied to the above rocks.
Don Hadden

Ardea are an independent specialist photographic library supplying high quality images of wildlife, pets and the environment

Media ID 8144451

© Ardea - All Rights Reserved

Rock Formations Rocks Geode

EDITORS COMMENTS
. This photo print, captured by Don Hadden in the remote Western Australia, showcases a mesmerizing geode formation known as DH-4393. Geodes are nature's hidden treasures, formed through a fascinating process involving expansion and crystallization. Imagine an initial cavity filled with fluid, often a salt solution. As chalcedony forms on the edges of this cavity from silica gel, it isolates the salt solution within. If the surrounding water is less salty, osmosis kicks in and creates outward pressure – causing the geode to expand until equilibrium is reached. But that's not all! Crystallization and dehydration of the silica gel can lead to cracking, allowing mineral-bearing fluids to enter. These fluids then precipitate minerals inside the geode, resulting in stunning crystal-filled wonders! While some may use "geode" loosely for any spherical cavity within rocks (naughty!), let's stick to its true definition when admiring this geological marvel. So sit back and let your imagination run wild as you gaze upon this incredible snapshot – where Mother Nature plays her own game of hide-and-seek with sparkling crystals nestled deep within these ancient rocks. It's like peering into Earth's very own crystal ball!

MADE IN THE UK
Safe Shipping with 30 Day Money Back Guarantee

FREE PERSONALISATION*
We are proud to offer a range of customisation features including Personalised Captions, Color Filters and Picture Zoom Tools

SECURE PAYMENTS
We happily accept a wide range of payment options so you can pay for the things you need in the way that is most convenient for you

* Options may vary by product and licensing agreement. Zoomed Pictures can be adjusted in the Basket.