"Unlike its name suggests, the Hope Diamond is a cursed jewel that brings ruin from one owner to the next. A few supposed victims include King Louis XVI and his wife, Marie Antoinette."
—Persona 5 Compendium
Hope Diamond can only be encountered in Mementos' Path of Sheriruth floors 7 to 9 and 11 to 13, after clearing Shido's Palace. The most effective way to capture this Shadow is by Downing it using Physical attacks with High critical rate, such as Lucky Punch or Miracle Punch.