Identification of gemstones

Louise Joyner is an expert in gemology, known for her detailed work in the field. Her book, "Identification of gemstones," is a trusted resource for anyone interested in precious stones.

Michael O'Donoghue's writing spans a surprising range, from the satirical National Lampoon Encyclopedia of Humor to the dark fiction of Dark Love. He also authored practical guides like The Pocket Guide to Rocks and Minerals and the American Nature Guides.