The 987th meeting of 

The Mineralogical Society


Southern California


March Meeting

ZOOM presentation

New insights into

the Structure and Formation

of Wire Silver and Gold

Presented by John Rakovan

Friday, March 12, 2021 at  7:30.

See program notes below

Visitors are always welcome

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,   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.

For more information

Program Notes: EFFECTIVE MARCH 21, 2021


 MSSC’s current ZOOM Invite list is over 80. We are averaging about 40 – 50 participants over the past 3 months. 

Effective: March 21, 2021 we will delete our current ZOOM list.  If you want to continue participating in future MSSC ZOOM meetings you will need to send Rudy Lopez an email.

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, March 12, 2021 at 7:30

New insights into the structure and formation of wire silver and gold.

Presented by John Rakovan

Much more common in silver than in gold, the unusual morphology known as a “wire” can resemble the finest of threads to the strongest of ropes.  Although they have adorned the shelves of mineral collections for centuries, very little has been known about wire specimens until recently.  Are they single crystals or bundles of many fibrous crystals? How do they grow? Some have suggested extrusion. Answers to these questions and discovery of unexpected and yet unexplained compositions have resulted from our work.  The study has included some of the finest known examples of wire silver and gold and has utilized some of the world’s most powerful scientific instruments. In this talk I will present the findings of our research and photographs of these spectacular and enigmatic specimens.


Upcoming Events

  • April 9, 2021: Krista Sawchuk: Discovering the Deep Earth via ZOOM

  • April 25, 2021: Board Meeting via ZOOM
  • May 14, 2021: Howard Heitner: The Tilly Foster Mine, A Classic Mineral Locality via ZOOM
  • June 11, 2021: Peter Goetz: Beautiful Opal, Identification and Internet Opal

  • Membership Field Trip Details, click here to go to field trip page

Important news about the MSSC Roster

The MSSC is pleased to offer the new 2020 edition of Bob Pedersen’s X- Dana 

X-Dana Mineral Spreadsheet