| Hard Rock Zone Facebook Page | https://www.facebook.com/hardrockzone |
| British Geological Survey | http://www.bgs.ac.uk/ |
| Volcanic and Magmatic Studies Group (VMSG) | http://www.vmsg.org.uk/ |
| VMSG Facebook Group | https://www.facebook.com/groups/vmsg.uk/ |
| The Mineralogical Society | https://www.minersoc.org |
| The Geological Society | https://www.geolsoc.org.uk/ |
| British Antarctic Survey | https://www.bas.ac.uk/ |
| MantlePlumes.org | http://www.mantleplumes.org/ |
| Geokem | http://www.geokem.com/ |
| Georoc | http://georoc.mpch-mainz.gwdg.de/georoc/ |
| US Geological Survey | https://www.usgs.gov/ |
| Global Volcanism Project | http://volcano.si.edu/ |
| DougalEARTH | http://dougalearth.com/ |
| Metamorphic Studies Group | https://www.minersoc.org/msg.html |
| Tools for Petrologists | http://www.kaylaiacovino.com/tools-for-petrologists/ |
| VOLCANOFILES | http://volcanofiles.com/ |
| Volcano World | http://volcano.oregonstate.edu/ |
| Rock Collecting: An Educational Home Hobby | https://www.improvenet.com/a/rock-collecting-an-educational-home-hobby |
| How Diamonds are Formed - Beyond 4Cs | https://beyond4cs.com/how-are-diamonds-made-and-formed/ |
