Rockhound and related links - especially in the UK

Lapidary Digest - I know it's in the USA but this has to come first - nice one Hale!

Chris Harlow's site - nice agates!

Lapidary Arts Digest - by Thurmond Moore III following on from Hale

Orchid -   The Ganoksin Project - The gem and jewelry world’s foremost information
resource on the Internet. Open to the public, Free of charge - a substantial library of articles, publications, reports, and technical data on gem and jewelry related topics; as well as a
sizable collection of art and jewelry galleries, for both the casual visitor and the professional.