Toronto police have tweeted pictures of an elderly woman who they allege stole a rock inscribed by Yoko Ono from the Gardiner Museum at 11 Queen’s Park on March 12 at about 5:30 p.m. The rock had been on display as part of an art exhibit by Ono, widow of John Lennon. It’s worth an estimated $17,500 US. The exhibit is an interactive one. Patrons can freely come, pick up the rocks and use them for meditation and reflection before returning them. The woman was wearing a black coat, red scarf, black hat and carrying a black bag.