The most common cuts that I'm aware of are quanine and B12.
You shouldn't worry about what your coke is cut with because you shouldn't be buying powder anyways. You need to find a cokehead who can show you raw (no, raw isn't pure, but it either hasn't been cut at all or only up to three times since entering the country and looks professional). And then you need to be shown what rerock looks like. Rerock is what your desperate fiend dealer does. He cuts the hell out of the stuff usually between 50-75% and gets it back together to look like a ball, only it's really obvious to anyone with experience. Then he sells it for 18374032879 times more than it's worth to idiots so he can afford his habit.
Why should you be buying balled coke instead of powder? So you don't get b.s. low quality bullshit. If you think $50-80 is too much to pay for a gram of good coke as oppossed to a $20 bag or two, then you shouldn't be using coke because you're wasting your time.
Now, if you're asking this information to cut coke so you can sell it, you should die.
Here's why:
1) if you're selling little bags of powder, people will pay no matter what you want to charge for them within reason. if someone ask why they're short, say "it's raw uncut". if you put coke in the face of someone who wants it, they'll pay $20 for a small line.
2) it's dick and pointless to cut any drug. if one person starts cutting drugs then other dealers in the area will cut theres. if you're anybody and selling a lot, you contribute to the decline in quality in your area.
3) it's a proven fact that if you cut drugs you will become a homosexual.