Chicago-
Heroin Slang:
[Blows, foils, dope, H, White devil j/k

]
Forms/Types: Chicago is a market that gets its heroin supply from all 4 of the major source countries. Most common form is #4 heroin, #3 heroin [smokable/or injecable using an acid] is around but not 'often' sold on the street, #2 [tar] is around and is concentrated in the mexican communities it can be bought off the street easier than #3. I am sure there is heroin base around for some reason or the other also.
Purity: Ranges wildly 10-80% Street purity is good, if you know where to go. [Tan Brown White] When purchased off the streets purity skyrockets. Dormin is one of the most common cuts here and it always produces a strong nod while keeping the heroin content low [red flakes can be seen in the dope sometimes blue, the dope is real white].
Sizes of packaging:
Freebies: Rare, openings of new spots, being at the right place right time
Nickle bags: 5 dolla usually a nice shot of dope [Never weighed one but by the looks of it 100mg or easily over. Nickle spots are few, Nickle rock spots on the other hand...
Standard bag: 10 dolla/Sawbuck 100-200mgs [Usually on the heavy side]
Jab-pack-bundle: [11-12 blows for the price of 10, sometimes lame ass spots will only have 10 in their paks]
Brick: 5-10 Jabs/paks [In NY I know a brick refers to 500 bags and some ppl probably use that slang here also]
1. Foils
2. Foils [each foil double-sided taped up, occasionally you will see someone selling rolls, like a roll of raffle tickets. A pack [10-12 foils in a 10 inch piece of tape]
3. Foils with dope inside a rolling paper w/ a grain of rice or a split pea [mainly in the summer months when humidity is an issue]
4. 1-inch x 1-inch little plastic baggies your able to see the powder [colored or prints on um, pitchforks, icecream cones, hearts, etc.]
5. The small ziplok plastic baggies w/ foil packet inside [often stapled or melted]
6. Tied-off into the corner of the bag
7. Capsules size 00
8. Straws [2 inch section of a McDonalds straw heat sealed at both ends, mainly sold towards snorters. You just cut one end off and sniff]
9. Paper folds
10. Stamped wax bags [although I have not seen that method being used for over 10 yrs, always wonder why? Last stamp I had was 'Unbelieveables']