
Block Island Glacial Erratics
Block Island beaches and Mohegan Bluffs clay cliffs yield glacial erratics and interesting pebbles washed from offshore deposits.
View detailsMixed or specialty collecting — zeolites, fluorescent minerals, thundereggs, and unique regional finds.
8 other destinations in Rhode Island.
Rockhounding sites in Rhode Island — other: 8 spots in our directory. Sort live from your phone with near me, or browse all U.S. other rockhounding sites and the Rhode Island state page.
Mixed or specialty collecting — zeolites, fluorescent minerals, thundereggs, and unique regional finds.
We currently document 8 other collecting sites in Rhode Island. Each listing includes original descriptions, visitor notes, and last-updated dates when available.
Other destinations in Rhode Island vary widely in access, season, and legality. Some are official recreation areas; others are informal gravel bars. Read the access and safety sections on each listing — never assume collecting is allowed without checking current signage.
For trip planning beyond this filter, browse the full Rhode Island state page, our guides, or use near me to sort by distance from your location.
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Block Island beaches and Mohegan Bluffs clay cliffs yield glacial erratics and interesting pebbles washed from offshore deposits.
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Bowenite is a documented rockhounding destination in RI. Collectors visit for mixed minerals and rocks and related material. Access rules and land ownership vary — confirm current status with the managing agency or landowner before collecting.
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Cumberlandite is a documented rockhounding destination in RI. Collectors visit for mixed minerals and rocks and related material. Access rules and land ownership vary — confirm current status with the managing agency or landowner before collecting.
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Cumberlandite, Rhode Island's state rock, is one of the rarest igneous rocks on Earth found only in northern Rhode Island iron hills.
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Jamestown Bridge is a documented mineral occurrence near RI. Reported specimens include Staurolite. Verify land access and collecting rules before visiting.
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Moosup River is a documented mineral occurrence near RI. Reported specimens include Epidote, Hornblende, Orthoclase, Pyrite, Apatite, Biotite, Garnet, Chlorite, Labradorite, Serpentine. Verify land access and collecting rules before visiting.
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North Providence is a documented mineral occurrence near RI. Reported specimens include Bowenite, Quartz, Serpentine. Verify land access and collecting rules before visiting.
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West Greenwich is a documented mineral occurrence near RI. Reported specimens include Amazonite. Verify land access and collecting rules before visiting.
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