Highway Bridges: A Northern California Sampler (Popularity: )

Article on the history of California bridges by Jill Livingston, published in the Society for ...
Category: Science\Technology\Structural Engineering\Bridge

Ancient Stones - Megaliths in Western Europe (Popularity: )

Picture gallery and descriptions of megalithic sites in Western Europe. In English and German, with ...
Category: Science\Social Sciences\Archaeology\Topics

Hinkle's Rock Shop & Opal Mine (Popularity: )

Specialize in Oregon thundereggs as well as various other Oregon materials. Plus home for the ...
Category: Science\Earth Sciences\Geology\Rocks and Minerals

Randy's Rocks and Gemstones (Popularity: )

Rock shop in northern California. Rock cutting and faceting fine gemstones. Will buy old collections.
Category: Science\Earth Sciences\Geology\Rocks and Minerals

Minerals-N-More (Popularity: )

Dealers of gems, minerals, and jewelry.
Category: Science\Earth Sciences\Geology\Rocks and Minerals