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Mobile Rock Gem Society Your Custom Text Here Mobile Rock Gem Society Home Welcome to the online home of the Mobile Rock Gem Society. MRGS is a 501c3 nonprofit organization located in Mobile Alabama dedicated to stimulating interest in earth sciences and supporting the education of geology mineralogy lapidary arts and related subjects. Membership is open to anyone age seven and up who is interested in Geology Lapidary Mineralogy Paleontology Fossils or other related Earth Sciences. We also have an Annual Rock Gem Show.