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About the Author
Hobart M. King, Ph.D., GIA GG
Hobart M. King
Hobart M. King is the manager and publisher of Geology.com. He is a geologist with over 45 years of experience, has a Ph.D. in geology, and is a GIA graduate gemologist. Much of his work has focused on coal geology, industrial minerals, gemology, geologic hazards, and geoscience education.
He has authored many of the internet’s most popular articles about rocks, minerals and gems. He writes most of the content published on Geology.com and compiles its daily news. His writing is read by over a million people each month, making him one of the world’s most widely read geologists.
His education includes: a Ph.D. and an M.S. in geology from West Virginia University; a B.S. in geology from California University of Pennsylvania; and, a Graduate Gemologist Diploma from the Gemological Institute of America. He is a registered professional geologist in the Commonwealth of Pennsylvania.
He has worked as a geologist in a variety of settings since 1975.
Dates |
Organization |
Activities |
1975-1982 |
West Virginia University |
Worked on research projects related to the geochemistry and mineralogy of coal and shale. |
1980-1994 |
West Virginia Geological and Economic Survey |
Worked in the positions of coal geologist, economic geologist and Head of the Economic Minerals and Geologic Hazards Section. |
1988-1994 |
Pennsylvania State University |
Taught introductory geology as an adjunct professor at the Fayette and McKeesport campuses. |
1994-2008 |
Mansfield University of Pennsylvania |
Taught courses in geology, hydrology, global positioning systems, and web-based cartography. Director of the Center for Effective Teaching, content area advisor for the Earth and Space Science Education Program. |
2005-Present |
Geology.com |
Manager, primary author and publisher. |
Dr. King was recently featured in an alumni profile published by the Gemological Institute of America and in a success story published on the Google Adsense website.
Some of the articles on Geology.com written by Hobart King appear below. Much of his early work can be found in his Google Scholar profile.
In addition to his work at Geology.com, he is also involved in internet retail as owner and manager of RockTumbler.com and WaterproofPaper.com.
Biggest Misconception Lots of people think that diamonds form from coal. Not True!
Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing.
Making Beer With Rocks - Do you know which fossiliferous rock is used to make beer?
Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light.
Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.
Rare Earth Elements are used in cell phones, DVDs, batteries, magnets & many other products.
Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States.
Moldavite is a gem material born about 15 million years ago when a pair of asteroids struck Europe.
Petrified Wood is a fossil that forms when dissolved material precipitates and replaces wood.
Coal Through a Microscope Coal is more than a black rock. It's THE most interesting rock.
Utica Shale A giant reservoir of natural gas, oil, and natural gas liquids below the Marcellus.
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| More General Geology |
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Gifts That Rock |
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Diamonds from Coal? |
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What is a Geyser? |
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The Doorway to Hell |
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What is the San Andreas Fault? |
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Igneous and Volcanic Features |
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Spectacular Fossils |
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Bubbles in Amber |
Find Other Topics on Geology.com:
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