Great Scopes Microscopes (Popularity: )

Informative microscope buyer's guide, free online science labs, plus stereo and compound microscopes from novice ...
Category: Science\Instruments and Supplies\Laboratory Equipment\Microscopes

Secrets of the Gem Trade. The Connoisseur's Guide To Precious Gemstones. (Popularity: )

A new gem book by by R. W. Wise.
Category: Science\Earth Sciences\Geology\Rocks and Minerals