The model and activist took to Instagram to share a photo of the two-stone ring beside her gold wedding band.
Ratajkowski previously revealed her now-husband proposed without a ring - and almost didn't get a 'yes' from his bride.
“He proposed to me at Minetta Tavern and he didn’t have a ring, so I was like, ‘Hmm, nah,’” the model said during an appearance on the Tonight Show with Jimmy Fallon.
“And then he took the paper clip that the bill was paid with and made me a ring, which I actually thought was really romantic.”
On the unique design, the 27-year-old told Vogue, "We liked the idea of two stones instead of one and spent a long time looking at rings with multiple stones for inspiration."
“At one point it included a ruby as the second stone, [but] ultimately we loved the idea of the femininity of the pear contrasted with the architecture of the princess."
The pair wed at City Hall on February 23rd after only a few weeks of dating. Ratajkowski wore a Zara pantsuit and wide-brimmed hat for the occasion.