Welcome to the Contra Costa Mineral and Gem Society!

Our general meetings are the 2nd Monday each month at Centre Concord, 5298 Clayton Rd., Concord, CA 94521. Meeting hall opens at 6:30 p.m., meeting begins promptly at 7:30 p.m.

Next meeting Monday, October 14, 2019:


For our October 14 meeting, we’re honored to have Sheahan Stephen come back to present a fascinating program on how gem merchants build a transparent chain of custody on the gems they sell. Sheahan recently shot some video in Sri Lanka that will be a part of his presentation. You may remember his earlier program about sapphires that was very well received. Speaking with authority and deep, professional knowledge, he will provide a program you won’t want to miss!


More news:

There will be NO Gem-O-Rama in 2019.

On August 6 Searles Valley Minerals Inc. notified the Searles Lake Gem & Mineral Society that the strong earthquakes on July 4 and 5 damaged their facilities to such an extent that SVM will not be able to host any Gem-O-Rama gem show activities on their properties during this year’s gem show. The SVM exclusion includes all access to Searles Lake to collect saline minerals, including Searles Lake pink halite, and all tours through their manufacturing facilities. Because these activities form the backbone of the Gem-O-Rama, we believe that we must cancel the 2019 Gem-O-Rama in Trona, California.

Please help us by passing this information on to any person or any organization that you think might be interested in attending the Gem-O-Rama in 2019 so that they won’t be surprised and disappointed if they try to attend.

For more information and confirmation, visit our website at: www1.iwvisp.com/tronagemclub/.

CCMGS is now on Facebook!



Monthly Display Competition

Members are eligible to enter these competitions and win recognition.  As long as there are two or more items entered in the area of competition, the winner is eligible to win a cash prize!
FACETERS: Create a new project and bring it in to share. We have a special display tray to show your work off at its beautiful best!
WEARABLE ART: Bring your original work, necklaces, earrings, rings, cuffs, etc. and hang them on our special display board for everyone to see, enjoy, and vote for!
CABBERS: We have three categories for you to compete in:
NOVICE: Any member who has not won the “Pro” designation in previous years.
PRO: Any member who has won the “Pro” designation in previous years.
SHAPE OF THE MONTH: Pros and Novices compete side-by-side to create the most eye-catching cabochon in the shape of the month.

The shapes are:
January: Irregular
February: Heart
March: Round
April: Oval
May: Pear (teardrop)
June: Rectangles & squares
July: Free-form
August: Triangle
September: Auction night – no competition
October: Marquis
November: Oval
December: Holiday party – no competition