Live 1/2, All in decision on the turn

[Warder]

I'm in AC playing in a pretty good 1/2 game. I've managed to grind my way up to about $700 when this hand comes up.

Preflop: There are 4 limpers, I have Jd Jc in the big blind and make it $15 to go and get 4 callers.

Flop: (Pot $60) Td 7d 3d I bet out $40 and get called by UTG, who is a bad player. He slowplays any big hands.... I don't think I've seen him raise or reraise one time.

Turn (Pot $140) 2d I bet out $85 trying to take the pot down right there if the guy doesn't have a diamond. Instead, he mumbles "You hit that diamond didn't you? Well if you got me beat, you got me beat..." He then proceeds to push making the pot $510 and $200 more for me to call.

Your thoughts?