A jewelry expert shares an estimated value for the 'obscure' piece of jewelry and tells PEOPLE what makes the customized gift is so special Catherine Santino is a Style Writer-Reporter at PEOPLE.

The SKIMS founder received the gift from her 11-year-old daughter as she turned ... gifting her a diamond necklace for her 44th birthday — which displayed a very strange engraving on the front.

Kim, 44, took to Instagram to show off the gifts her kids got her for her birthday on Monday, October 21, including a gold-and-diamond necklace from daughter North, 11. “North got me this ...