According to US Weekly, Kylie was on Snapchat showing off the big stone. "If this is my promise ring I wanna know what my engagement ring is gonna look like," she captioned.
Interestingly, this is not the first time that the ring has made its way onto Kylie's hand. In July, the 19-year-old shared a pic on Instagram that showed her wearing what appears to be the same ring. A day earlier, she reportedly shared a photo with 26-year-old Tyga captioned, "Mr. and Mrs."
Kylie has a history of sparking engagement rumors. As per In Touch, she's often seen flashing a ring on her left hand and posting cryptic messages about her man. These rumors usually get dismissed and resurface shortly after. In July, sources shared with E! that Kylie had apparently discussed marrying her on-and-off boyfriend.