What is "kajaal" in the novel, When Dimple Met Rishi?

Kajaal is a “potted eyeliner” that Dimple’s mother presses her to put on throughout the novel (4). Dimple repeatedly refuses and when out of anger and frustration that her mother does not recognize her ambitious career dreams she calls it “eyeliner” - her mother responds, “It’s not eyeliner it’s kajaal” (6).