The engagement ring of actress Sharon Tate is going to hit the auction block at GottaHaveRockAndRoll.com on November 30. Director Roman Polanski gave Tate the ring in 1967, two years before she was brutally murdered by the Manson Family. The pop culture auction site believes that Tate was most likely wearing the ring during her murder in 1969 and comes with a certificate of authenticity from GottaHaveRockAndRoll.com. The minimum bid for this piece of grim Hollywood memorabilia is $10,000, but they estimate it going for anywhere from $25,000 to $50,000.

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