I've felt serious envy last time I was 8-12 years old or something like that. I think it must have been a social occasion; some kids are playing, then some adult comes along and picks up some random kid to praise and I'm left unnoticed.
It required very specific setting for me to get envious. I had to have done something I required to be acknowledged (rare). I had to believe that someone would get credit and most of all, greater participation in the group instead of me, so I could get envious of them.
Closest thing to envy at my adult age have been when someone convincingly argues for their great career situation and the obscenely successful lot in the life, something that's happened without much hard work for them. I don't care much about money, but more about a good situation to participate in intelligent, meaningful activities - in other words, a good job. I've always had trouble getting a good job, I guess that's the only possible source of envy for me. Still, somehow the feeling of envy stops really short. I think I recognize the possibility for that, but it it never becomes real for more than a second, if even that.
Jealousy? I've had that in my adult life. Last time 9 years ago, when some jerk picked up someone I wanted to date. She wasn't into me one bit, thought I was for a while mistaken to believe otherwise. That guy didn't have any good qualities I could accept, so the situation felt like completely insane.. I was mad with anger for a while. I held a grunge for some 4 years. There would be more to tell of it, but I'll keep it at that. I believe it was the longest, persisting negative feeling I've had in my life. The feeling hasn't recurred since. I just haven't felt the need to "own" anyone ever since.
I'm glad to be such a envy- and jealousy-free individual.