T.I.: Jewelry Company Sues ... He's a Very Flashy Deadbeat!

T.I. may have to start mining for some gold of his own because at least one jewelry store is done with him, claiming he walked off with a ton of their bling and never anted up.

Aydin & Co in Georgia says in a new lawsuit it delivered an 18.5 karat white gold bracelet, a ring and yellow gold rosary to the rapper in 2014 and Tip paid $20k. Problem is ... he still owes $44k.

That's just the tip of the iceberg. According to the lawsuit, during the decade T.I. was one of its shoppers, he stiffed them out of more than $400k.

All tolled, Aydin's gunning for T.I. to the tune of $700k.

T.I. says the lawsuit is BS.