Have a change of scene (1990)

Lori Saint-Just, a master jeweler shattered by his wife’s death, relocates and becomes obsessed with Cona, a prostitute who first entices then rebuffs him. Driven to possess her, he robs and accidentally kills his benefactor to inherit a $30 billion fortune, gives Cona a replica necklace, and she enacts a staged murder-suicide to destroy them both while sparing him guilt.