Our country also called the 'spice bowl' of the world, is one of the largest importers of majestic masalas on earth. Among many such spices that we produce and export to many parts of the world, one rare spice is the black stone flower. Also known as Chharila, Patthar phool, Kalpasi, or Dagad phool, it is used in Indian kitchens for various culinary uses.