But they didn't get away with the biggest prize of all — the nearly 14-pound Fricot Nugget, a giant crystalline gold mass unearthed in the Gold Rush era.
During their attempt to grab the massive nugget, the robbers triggered an alarm that alerted authorities who swarmed the museum but were unable to nab the thieves.
At least two robbers wearing hoods and armed with pickaxes threatened workers during the heist Friday at the California Mining and Minerals Museum in Mariposa, the California Highway Patrol said.
No suspects have been identified.
