Metal (IMAGE) International School of Advanced Studies (SISSA) Caption This is a close up of some iron pyrite crystals at the Oxford University Museum. Credit Chrstopher Usage Restrictions Some rights reserved: <a target="_blank" href="http://creativecommons.org/licenses/by-nc-nd/2.0/">http://creativecommons.org/licenses/by-nc-nd/2.0/</a> <p><a target="_blank" href="http://www.flickr.com/photos/chrstopher/533545138/sizes/l/in/photolist-P9yo7-22wPZ9-22KxNs-2jXPre-2jXQcx-2jXQyR-2jXRhX-2jXRHv-2k3aG5-2k3brh-2k3cAJ-2zPYcN-2zQ1F1-2VYVUV-2VYW6v-2ZUngr-34TUzJ-3cnhrE-3ivYxi-3iAn3d-4wDSYp-4xcXNy-4FySus-4GKt1b-4YvoGN-4YKKpV-5dYAJE-5nbLqU-5y6tUi-5BCT3k-5EZHFd-5JhuJm-5QYBUX-67afYQ-6bJZiG-6fuyFb-6nWqfh-6p5ay8-6riTdA-6xeeJ4-6L5yHa-6LiUd9-6PXYp7-6Q9G26-6T1AnY-6V5v2J-7bFggW-7dd3js-7gnzYK-7h7vb4-7k3nPm/">http://www.flickr.com/photos/chrstopher/533545138/sizes/l/in/photolist-P9yo7-22wPZ9-22KxNs-2jXPre-2jXQcx-2jXQyR-2jXRhX-2jXRHv-2k3aG5-2k3brh-2k3cAJ-2zPYcN-2zQ1F1-2VYVUV-2VYW6v-2ZUngr-34TUzJ-3cnhrE-3ivYxi-3iAn3d-4wDSYp-4xcXNy-4FySus-4GKt1b-4YvoGN-4YKKpV-5dYAJE-5nbLqU-5y6tUi-5BCT3k-5EZHFd-5JhuJm-5QYBUX-67afYQ-6bJZiG-6fuyFb-6nWqfh-6p5ay8-6riTdA-6xeeJ4-6L5yHa-6LiUd9-6PXYp7-6Q9G26-6T1AnY-6V5v2J-7bFggW-7dd3js-7gnzYK-7h7vb4-7k3nPm/</a> License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.