The name Diamond comes from the Greek word Adamas meaning indestructible. Diamonds are the hardest rock on Earth.
Diamonds form between 120 – 200km below the surface, in the Earth’s mantle, in patches amongst mantle rocks called peridotites and eclogites. Study of these rocks tell us that the material from which diamonds form is sea [...]
Yearly Archives: 2008
December – Diamond
on December 1, 2008 Leave a comment
November – Ammonite
Ammonites are coiled relatives of the octopus (Cephalopods) and became extinct at the end of the Cretaceous Period around 65 million years ago.
Below is an image of a Harpoceras, which lived during the Jurassic Period. These fossils can be found in the Upper Liassic shale (Whitby Mudstone Formation) which crops-out widely across Cleveland and the [...]
on November 1, 2008 Leave a comment
October – Gryphaea
This fossil is easy to find on the beach anywhere between Redcar and Saltburn. Often known as a Devil’s Toenail.
It is a relative of they oyster and lived on the seabed in large numbers. This shell had two parts, one much larger than the other. Sometimes you find them still joined [...]
on October 8, 2008 Leave a comment
Past Events
Below is a list of events and activities already completed by the RIGS Group during the Alum, Alchemy and Ammonites project. Click on the links to view images of these events.
Friday 29th January 2010 Guisborough [...]
on July 3, 2008 Leave a comment