Originally Posted by BigThingWithHolesInIt
Call and jam any non-diamond turn.
This in a nutshell. Flopped flushes are rare and the guy above is right, why would OP raise and push out garbage (in relative terms, almost every hand you are holding is garbage on that flop or will soon be on many turn and rivers compared to a made flush). I can totally see a smaller overpair with a diamond here. Actually, possibly no diamond at all.
Then again, fish or madly tilted players don't think that far, so actually be prepared to see weird suited garbage now and then, though that is rare enough to actually just not fold this.