We're told he hooked her up with a bunch of gear from the Sailing Team -- Yachty's rap collective -- which included some custom jewelry. Danielle's name was engraved on the back of an 18-carat yellow gold necklace from Icebox Diamonds & Watches ... with 184 diamonds and a $10k price tag.
Our Yachty sources say he's purchased nearly 25 Sailing Team necklaces from the ATL-based jeweler.
As for why Danielle was a lucky winner, we're guessing it had something to do with her dope artwork of Yachty. Float on, kid.