Dumbarton Quarry GC2CH3Q
by jellis
Alameda county, CA, United States
7.72 Points
205 finds in 15 years, 10 months
Next find points: 7.69
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First available: August 8, 2010
Last Update: June 8, 2026 1:36 PM
Last Full Sync: February 16, 2026 6:49 AM
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Statistics last updated Tuesday, 09 June 2026 05:27:40 Eastern Daylight Time
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