Clint Eastwood's wife Dina still loves her estranged husband ... but hopes a little new age voodoo -- the use of crystals --  will rid her home of Clint's negative energy  ... TMZ has learned. 

Dina tweeted a pic from the Crystal Fantasy in Palm Springs ... where she dropped a couple of hundred dollars on crystals, incense, sage ... and other stuff believed to have metaphysical powers of healing and cleansing.

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