Useful sites which may be of further interest:

Open University Geological Society
Geology and Earth Related Sciences for All

National Museum of Wales
National Museum of Wales - The Mineralogy of Wales Database & further information following on from the book.

Dinosaur Directory in the Natural History Museum
This is a guide to 325 of the most well-described dinosaurs, including 1294 images.

NHM -The Vault
The Vault contains a dazzling collection of the finest gems, crystals, metals and meteorites from all around the world.

EARTH: the Natural History Museum on line
Investigate how the study of rocks, minerals and fossils can also enlighten scientists about the world around us and how knowledge of the past can help us predict our planet’s future survival.

Rockwatch
The nationwide (UK) club for young geologists

Mindat Mineral Database

British Geological Survey
Geoscience information and advice

Geologists Association
The Geologists' Association (GA) exists for all geologists and earth scientists, whether professional or amateur. It acts as a forum for the exchange of information, and it is a way for enthusiasts of all ages to meet people with similar interests.