Amber Heard: Long, Hard Deposition in Johnny Depp Case

Amber Heard was grilled until she was well done Saturday ... sitting for her long-awaited deposition for 7 long hours ... TMZ has learned.

Sources familiar with the situation tell us, Amber was asked about her claims of violence at the hands of Johnny Depp, and not just on May 21st. We're told she was asked in great detail about claims of past violence.

Our sources say Johnny's lawyer, Blair Berk, went into great detail about her alleged injuries on May 21st, and why 5 concierges, 2 police officers as well as security guards saw no evidence of such after the incident. Our sources say Amber, with lawyer Samantha Spector by her side, maintained she was injured and couldn't account for what others saw.

We're told early Sunday another settlement offer was passed around and the lawyers are working toward a settlement, which could come at any time.