Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: What type stone is on the corpse of the elderly medium? Title: Black Sabbath Movie plot: Note: this synopsis is for the orginal Italian release with the segments in this certain order.Boris Karloff introduces three horror tales of the macabre and the supernatural known as the 'Three Faces of Fear'.THE TELEPHONERosy (Michele Mercier) is an attractive, high-priced Parisian call-girl who returns to her spacious, basement apartment after an evening out when she immediately gets beset by a series of strange phone calls. The caller soon identified himself as Frank, her ex-pimp who has recently escaped from prison. Rosy is terrified for it was her testimony that landed the man in jail. Looking for solace, Rosy phones her lesbian lover Mary (Lynda Alfonsi). The two women have been estranged for some time, but Rosy is certain that she is the only one who can help her. Mary agrees to come over that night. Seconds later, Frank calls again, promising that no matter who she calls for protection, he will have his revenge. Unknown to Rosy, Mary is the caller impersonating Frank. Marry arrives at Rosy's apartment soon after, and does her best to calm Rosy's nerves. She gives the panic-struck woman a tranquillizer and puts her to bed.Later that night as Rosy sleeps, Mary gets up out of bed, and pens a note of confession: she was the one making the strange phone calls when she learned of Franks escape from prison. Knowing that Rosy would call on her for help, she explains that she felt it was her way of coming back into her life after their breakup. While she is busy writing, she fails to notice an intruder in the apartment. This time it is Frank, for real. He creeps up behind Mary and strangles her to death with one of Rosys nylon stockings. The sound of the struggle awaken Rosy and she gasps in fright. The murderous pimp realizes that he just killed the wrong woman, and slowly makes his way to Rosy's bed. However, earlier that night, Rosy had placed a butcher knife under her pillow at Mary's suggestion. Rosy seizes the knife and stabs Frank with it as he's beginning to strangle her. Rosy drops the knife and...
diamond