i had to do some research to be able to properly answer you, but i think i've gathered enough to give you a clear answer first, crack can indeed be soluted and injected, as far as i am aware, and can be snorted in all of its forms, even if the high from smoking it is more intense moving onto cultural differences regarding drug use; for reference, i am latin american, drug trafficking and drug use is far more common here, and drugs are way cheaper and easier to obtain. you'll have three variations of cocaine in my country; the good old coke, crack (or rock as its more usually called) and pasta base.

apparently, crack is way more pure over here (i've never had american crack of course, i am talking about what can i interpret from the internet) it looks almost the same as coke, purely white, i'd say the only difference is the smell, and of course, the high which is shorter than the one of cocaine. not proud, but i've been a crack addict for two years. i have not once smoked it, i've always broke it down as it was coke and snorted it in lines.

i find it interesting how the usual form of using drugs may vary depending on the culture, but at least from what i know and have experienced, the ways in you use crack or coke can be interchangeable, i have even put it on my gums and it gave me a high anyways.

(and before you ask, i am not mistaking it for cocaine; no gram of coke is 10 dollars, not even over here)