The 984th meeting of 

The Mineralogical Society


Southern California


December Meeting

ZOOM presentation

Natural Radiation – A Tale of Two Minerals

presented by

Dr. George R. Rossman


Friday, December 11, 2020 at 7:30.

See program notes below

About us…

The Mineralogical Society of Southern California is dedicated to the dissemination of a general knowledge of the mineralogical and related earth sciences through the study and collecting of mineral specimens. Organized in 1931, it is the oldest mineralogical society in the western United States.
The MSSC is a scientific non-profit organization that actively supports the Pasadena City College Geology Department, its associated Dana Club, and the Field Science Scholarship Fund.  Support is also given to Mindat.
The MSSC is affiliated with the California Federation of Mineralogical Societies and American Federation of Mineralogical Societies.


by Rudy Lopez

Yes, the General Meetings at our normal PCC meeting location have been cancelled. BUT! There will be an internet meeting via ZOOM. Our President, George Rossman is offering a MSSC meeting via ZOOM as follows: He uses Caltech’s ZOOM license which allows meetings to last as long as the need [Caltech has given him permission to do this]. To sign up for the meeting see instructions in the current month’s bulletin.

Note: You only have to sign up once to be sent a meeting reminder every month.

Join us: Friday, December 11, 2020 at 7:30.

Natural Radiation – A Tale of Two Minerals: presented by Dr. George R. Rossman: Minerals of the feldspar group are the most common phases volumetrically in the crust of planet Earth. Ideally, when they have the textbook-ideal, composition, they are colorless. But, in fact, there are many colorful varieties of feldspars that are popular with collectors.

Dr. George R. Rossman is Professor of Mineralogy in the Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, and President of the Mineralogical Society of Southern California. He got his B.S. degree in Chemistry and Mathematics from Wisconsin State University, Eau Claire, and his Ph.D. from Caltech in Chemistry. His principal research interests deal with the use spectroscopic probes to study minerals. His work addresses problems relating to the origin of color phenomena in minerals; phase identification; and the special role of metal ions in minerals.


Upcoming Events

Important news about the MSSC Rosters for 2020.

The MSSC is pleased to offer the new 2019 edition of Bob Pedersen’s X- Dana 

X-Dana Mineral Spreadsheet

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