Tyga Sued Accused of Jacking $91K Worth of Grade 'A' Bling

 
Tyga is rolling around town with some sick jewelry -- a diamond watch and chain worth more than $91,000 -- but problem is the bling ain't his ... at least according to a lawsuit filed by a famous Beverly Hills jeweler.

In the suit, Jason of Beverly Hills claims the rapper agreed to drop $28,275 for the jeweler's diamond pantheon watch back in August, 2012.see pics after the cut....



JBH also claims Tyga -- real name Michael Stevenson -- borrowed a $63,000 diamond Cuban link chain in December, 2012 -- but never returned the piece.

Now JBH is suing for the cost of both pieces, plus late fees ... which just about doubles Tyga's tab to a whopping $185,306.50..