Welcome to the Contra Costa Mineral and Gem Society!

CCMGS is on Facebook!

PLEASE NOTE: As of January 2023, this website is not being updated.  Please check our FACEBOOK page for current information!

Meetings are held the second Monday of the month.
Doors open 6:30 p.m., program 7:00 p.m.
Endeavor Hall, 6008 Center Street, Clayton
(Corner Center and Oak Streets)


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!

CABBERS: We have three categories for you to compete in:
Any member who has not won the “Pro” designation in previous years.
* PRO:
Any member who has won the “Pro” designation in previous years.
Pros and Novices compete side-by-side to create the most eye-catching cabochon in the shape of the month (see below for list of shape-of-the-month).

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!

Shape of the Month:

January: Irregular July: Free-form
February: Heart August: Triangle
March: Round September: No competition (Auction)
April: Oval October: Marquise
May: Pear (teardrop) November: Oval
June: Rectangles & squares December: No competition (Party)