The 19-year-old reality star wore her enormous promise ring and a new diamond necklace dedicated to the 26-year-old rapper on a lunch date with Tyga in Los Angeles.
Jenner shared several Snapchat videos featuring her new necklace, which spells out Tyga's nickname "T Raww" in diamond charms. The rapper also posted a photo on Instagram of Jenner wearing her jewelry.
"Feel me," he wrote to his 11 million followers.
Jenner and Tyga are longtime friends who confirmed their relationship at the reality star's 18th birthday party in August 2015. The Lip Kit mogul joked about her future engagement ring while showing off her promise ring in September.
"If this is my promise ring I wanna know what my engagement ring gonna look like," she said of the diamond sparkler.
Jenner's half-brother Rob Kardashian is engaged to and expecting with Tyga's ex-fiancée, Blac Chyna. Her half-sister Khloe Kardashian commented on the complicated family dynamic on Jimmy Kimmel Live! last week.
"It's, like, really fun this way. It makes, I think, our holidays a little more concise," she said.
"I do [think Rob will be a good dad]," the star added. "Rob has so many traits like my dad, so I think he's going to be great with the baby. I'm sure he's nervous. Any new dad should be."
Jenner and her family came to fame on E! series Keeping Up with the Kardashians, which airs Sundays at 9 p.m. ET. The teenager will release a new Lip Kit collection inspired by Khloe Kardashian on Wednesday.