Related: Hailey Bieber Kisses Husband Justin's Neck in Sweet Selfie After 'Romantic' Vacation. Following Jack's birth in August, a source exclusively told PEOPLE that Justin, 30,

The Rhode Skin founder took to her Instagram Story Saturday to show off a new ring featuring side-by-side birthstones for herself and her infant son. Hailey pointed out that the square-shaped peridot signified Jack’s birth month of August, while the pear-shaped topaz was for “Mama.” The model recently celebrated her 28th birthday on Nov. 22.

Christmas came early for Hailey Bieber, who showed off the latest addition to her collection of luxury jewelry.

Hailey Bieber continues to honor her son, Jack Blues Bieber, in her accessory collection. Over the weekend, the model displayed her new custom ring on her Instagram Stories. A few months earlier, Hailey shared pictures of her new “JBB” necklace dedicated to her firstborn.

Hailey Bieber is keeping son Jack Blues close to her heart, sartorially speaking. Bieber, 28, debuted a massive two-stone ring via her Instagram Story on Saturday, December 21, where a square-shaped peridot diamond sat beside a teardrop bauble in topaz on a gold hand.

At least, that's the case for Hailey Bieber, who just debuted a new ring that features her and her son's birthstones. In an Instagram Story post on Saturday, Bieber revealed a ring inlaid with two jewels,

Hailey Bieber shared a picture of a new piece of jewelry in her Instagram Stories with a sweet meaning behind it. The photo showed the model’s hand wearing a ring with a pear-shaped topaz stone and a square-cut peridot set in gold.

Bieber revealed the ring on her Instagram Story, which showed a square-cut peridot positioned next to a topaz that was slightly angled on its side in a teardrop cut. She labeled the peridot "Jack" in honor of her and Justin Bieber's son,