IDENTIFY this opiate substance?

You can find anything anywhere, it's a matter of knowing the right person. Sounds like it was opium(pleasant perfumy flowery aroma) or black tar heroin(shitty smells like vinegar). Either way smoking it will get you nice'n fuckered up.

If you still have some left start with about the size of a match head on a piece of foil(heated below with candle or lighter) and take a small hit (suck the smoke through a straw) at first to get an idea of potency, working your way up to more hits. This will also give you an idea of what you are smoking, an extremely bitter acrid taste is black tar H and opium taste good like it's smell.