The victim, a 77-year-old woman who was afraid to be identified, said the armed man surprised her as she got into her car, which was parked off Park Lane outside Nordstrom.
"He said, 'I have a gun. Don't turn around. Do not move,'" she said. "He had me put my arms out, and he said, 'I want that pretty little fur.'"
The man demanded her $22,000 brown, full-length, fur coat and her $65,000 diamond ring.
"I feel like part of your life has been taken away, some of your favorite things," the victim said.
It is the first robbery in a NorthPark parking lot since December. Dallas police said they consider it a crime of opportunity.
"If there's someone wandering around the mall robbing people with a gun, we want to get him off the streets," Senior Cpl. Kevin Janse said.
"NorthPark patrons can feel confident that we take the safety and well-being of our guests very seriously," NorthPark Center spokeswoman Vail Tolbert said in a statement. "Lawless acts of any kind will not be tolerated at NorthPark Center."
While the victim lost close to $100,000 worth of possessions, she said she also gained a new sense of awareness.
"I probably was a little off-guard, which from now on, I'm going to be more cautious and more in control with what I'm doing and where I'm parking," she said.