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, February 11, 2019:

Coastal Geoscapes, John Karachewski, PhD.

Learn about the beautiful and interesting geology of the CA coast from sandy beaches to bedrock headlands. This presentation will also discuss environmental and natural hazard issues. Geologic landscapes (Geoscapes) from San Diego to Crescent City will highlight our federal, state, and county parks. Gain a new appreciation for this dynamic setting and ideas for future trips.

John is a geologist for the California-EPA in Berkeley. He has conducted geology and environmental projects throughout the western US from Colorado to Alaska to Midway Island and throughout California. John also teaches a GIS class at Diablo Valley College and leads numerous field trips throughout the Bay Area for the Field Institute – Point Reyes National Seashore Association and Emeritus College. Doris Sloan and John collaborated on a popular book about the “Geology of the San Francisco Bay Region,” published by the University of California Press.

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