'Mythbusters' Adam Savage at Comic-Con 2015

Be on the lookout for Adam Savage’s missing rare “Indiana Jones” Sankara Stone, which he hasn’t seen since a San Diego Comic-Con party on Saturday (July 11).

“To those asking my rare #IndianaJones Sankara Stone, missing since my party, hasn’t been returned. Devastating,” writes the “Mythbusters” star, confirming in the comments of his tweet that the stone was taken right out of his display case.

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Savage was at Comic-Con signing autographs on Saturday. The party in question was Cinephile, a celebration of film put on by Tested.com. Savage hosts the “One Day Builds” series for the website.