Rick Ross Puts Ring Back On Ex-Fiancee Lira Galore ... Just Good Biz

Rick Ross' 11 ct. ring is back on Lira Galore's hand -- less than 2 weeks after they called off their engagement, and their timing is impeccable.

The Boss dropped strong hints he and his ex were reuniting -- posting pics of them all hugged up -- but we've learned it's 100% back on. We know Lira hopped on a plane to go meet Rick Wednesday.

We're told they've been texting non-stop for the last week ... and finally decided to get back together. Of course, they just ended things Halloween weekend.

Now, the timing.

Rick's music video for "Sorry" dropped Thursday, and Lira plays his GF in the video. So, smart publicity for Rick to bust out the ring again, and smart for Lira because, well ... $350k ring! Win. Win.

Sorry.