The senior was unloading groceries on Saturday afternoon when a woman approached her.
The woman asked the 75-year-old, who lives in the 11700-block of 75 Avenue, how to get to Surrey Memorial Hospital. All the while, a man remained in a nearby car.
Seemingly grateful for the help, the woman handed the older lady a necklace.
When she reached for it, the woman grabbed her other hand and pulled a ring with seven one-carat diamonds from her finger.
When the senior demanded it back, the woman threw a ring at her. However, it wasn't the family heirloom she took.
The woman and man then sped off in a grey, four-door car.
The elderly woman, in search of her stolen ring, headed to Surrey Memorial Hospital in hopes of finding the pair.
They weren't there.
Now her family is offering a $5,000 reward for anyone with information that leads to the recovery of the stolen ring.
Police are looking for a man and a woman, both dark-skinned and between 45 and 55 years old. The man has short dark hair and a goatee, and the woman is heavy-set with long, curly dark hair.
They were driving a grey, four-door sedan.
Anyone with information about this theft is asked to call the Delta Police at 604-946-4411 or Crime Stoppers at 1-800-222-8477 (TIPS)