Rock, Gem & Mineral Identification

GIA Gem Encyclopedia

The Gemological Institute of America’s Gem Encyclopedia.


Geology and Earth Science news and information.

Handbook of Mineralogy

“The Handbook of Mineralogy series is a Five Volume set authored by John W. Anthony, Richard A. Bideaux, Kenneth W. Bladh, and Monte C. Nichols, and published by Mineral Data Publishing. Each mineral known at the time of publication occupies one page of the handbook.” This site contains the 4,463 pdf datasheets, one for each mineral.

ID How-To

10 Steps for Easy Mineral Identification

Mindat is now the world’s largest public database of mineral information with an army of worldwide volunteers adding and verifying new information daily.

Complete information guide to rocks, minerals & gemstones

Rock and Mineral Identification Flash Cards

Rock and mineral identification flash cards for learning/practicing for the science olympiad. A good learning/reference tool.

World's 10 Most Deadly Minerals

Minerals to watch out for