The film opens up on some space base and there is this emphasis that the humans need to keep this diamond object safe because it stores their secrets or something like that. This is told to a generic blonde hero.
Meanwhile, there is a little kid wandering around the base and then his eyes glow red and he transforms into some killer robot and starts murdering everyone at the base.
The Diamond gets transported to Earth (somehow) and the blonde Hero is sent there to retrieve it and keep it safe. Meanwhile, the robots send one of their own (disguised as a blonde woman pretty sure) to get it as well.
There is a lot of (Terminatorish) commotion to retrieve the diamond and the local Italian Mafia gets involved, as they just want the Diamond, thinking it's worth a lot of money. There is one scene where the mob boss pulls out a rocket launcher out of his van and shoots it at the female robot (but obviously being sci-fi, she survives).
It was made in the 80s/90s for sure (i remember this pre-2000). It could potentially be a telemovie, or an actual movie, but I'm not sure. Also, I remember the title having something like "Battlestar" in it. (But believe me I have searched the Battlestar Galactica-related content, although perhaps I haven't searched hard enough.)