Contra Costa Mineral & Gem Society

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Sphalerite crystals on druzy dolomite

ERN Item Type: 

  • Geoscience Organizations


Contra Costa Mineral & Gem Society


Our Purpose is to promote popular interest and education in the earth sciences, including geology, mineralogy, paleontology, the lapidary arts, and related subjects; to sponsor and provide means of coordinating the work and efforts of persons and groups with similar interests; and by and through such means to strive toward greater community and international good will and fellowship. We also support promoting and ensuring the right of amateur hobby collecting, recreational prospecting and mining, and the use of public and private lands for educational and recreational purposes related to the earth sciences.