Lindsay's business date was with Pascal Mouawad -- a jeweler who's worked with stars like Heidi Klum and Nicole Richie.
We're told the two sides discussed the possibility of creating an upcoming line together -- the second time they've talked about teaming up. Back in 2009, they kicked around the idea ... but nothing ever came to fruition.
However, this meeting was all business -- because after the jewelry talk, we're told Lindsay's top people (lawyers, managers, etc) strategized about upcoming film projects and other career moves.
According to our sources, Lindsay has "multiple scripts" to consider.
Not among them ... a biopic of a 1970s porn star.
UPDATE: We're told Pascal gave Lindsay a heart-shaped 10.10 carat diamond Rosette necklace selected by Pascal Mouawad himself. It has an estimated worth of $25,000.