More from this Author

Gems

by Michael O'Donoghue

Identification of Gemstones

by Michael O'Donoghue, Louise Joyner

Artificial Gemstones

by Michael O'Donoghue

Rocks and Minerals

by Michael O'Donoghue

Rocks and Minerals

by Theodore Rowland-Entwistle, Michael O'Donoghue, Richard Coombes (Illustrator)

Gemstones

by Michael O'Donoghue

Rocks and Minerals of the World

by Theodore Rowland-Entwistle, Michael O'Donoghue, Richard Coombes (Illustrator)

The Encyclopedia of Minerals and Gemstones

by Michael O'Donoghue

Gemstones

by Michael O'Donoghue

Rocks and Minerals of the World

by Michael O'Donoghue, World Book, Inc. Staff (Contribution by)

Opal

by Janet Clifford (Editor, Photographer), Si Frazier (Editor), Catherine Gaber (Editor), Peter Huber (Photographer), Jaroslav Hyrsl (Photographer), Rudolf Mende (Photographer), Guenther Neumeier (Editor, Translator, Maps by), Barry Neville, Michael O'Donoghue, Alex Ritchie (Photographer), Juergen Schuetz (Photographer), Paul Clifford (Editor), Elizabeth Smith, Gloria Staebler (Editor-In-Chief), Jack Townsend (Photographer), Max Weibel (Photographer), Klaus Eberhard Wild, Bruce Paul Gaber (Editor, Photographer, Maps by), Jenni Brammall (Photographer), Jeff Scovil (Photographer), Robert Smith (Photographer), Erica Van Pelt (Photographer), Andrew Cody, Leo Boner (Photographer), Zbynek Burival (Photographer), Erich Offermann (Photographer), Shoich Kondo (Photographer), Harold Van Pelt (Photographer), William Cook, Wilson Cooper, Tony Dabdoub, Bob Farrar (Photographer), Karl Fischer, Ann Frazier (Editor)

Producing Video for Teaching and Learning

by Michael O'Donoghue

Fossils

by Michael O'Donoghue

Producing Video for Teaching and Learning

by Michael O'Donoghue