Caltech Professor George Rossman takes a look at Chinese Andesine Feldspar for Tuesday, Sept. 21 Zoom Program Meeting

A variety of faceted andesines in table-down orientation.

There’s a controversy brewing over a new and beautiful red transparent gem out of the Democratic Republic of the Congo as well as Tibet or an unspecified location in China. Caltech Professor of Mineralogy George Rossman will discuss his research on this red copper-carrying feldspar at our September program meeting.

The Tuesday, Sept. 21 program meeting starts at 6:30 p.m. via Zoom. To join us, send an email to joenmar1[at]verizon.net in advance, using ‘PROGRAM MEETING’ in subject line, and request the Zoom meeting link. “See” you there!

Image borrowed from: http://minerals.gps.caltech.edu/manuscripts/2011/Chinese_Red_Feldspar_I/Index.html

March 13 Sidewinder/Ord Mtn fieldtrip

Attendees of Pasadena Lapidary Society’s fieldtrip of Saturday, March 13 collected tricolor marble from the Sidewinder Mtn area and copper minerals from Ord Mountain.

Chrysocolla on quartz found vicinity of Ord Mtn.
Malachite on Cuprite and Quartz


Parked and ready to rock(hound). Vicinity of Ord Mountain.

Old mine shaft; Ord Mountain.

Careful collecting on hillside; Ord Mtn area.