when you have a pile and you move it with a card or a razor or whatever, if it stands perfectly on the edge that the card was on, it's probably some decent stuff. if it falls/doesn't stand, it probably has a higher amount of cut/contaminants
pure/raw cocaine will typically dry your nose out, not make it run.
just because the product is a different color than you're used to, doesn't necessarily mean it's bad/lower quality. sometimes people use different chemical processes. (i'm not saying all different colored coke is good, because more often than not, the color, whether it be tan, yellow, or brown, comes from harmful additives/contaminants) the only color that i am aware of that is actually high quality (again, not saying all of this color means it's high quality) is tan. it has something to do with how they processed the coca paste. i can't remember exactly what the process is, because i was informed of this a while back, but i'm sure if ya do some research you could figure it out.
just because your product is in a chunk, doesn't always mean it's pure. re-rocking is a common practice where dealers press cut product back into rock form.
an efficient way to test the purity/quality of your product is to put it on some tin foil and light a lighter beneath it. don't let it burn, just allow it to melt for a few seconds. it should melt into a bubbly caramel-like substance. it shouldn't turn black, or stay the way it was.
cocaine is an oil-based product. so if you put some on your fingers and rub them together, it should pretty much dissolve/melt and basically disappear. if it's still in powder form after rubbing for a few seconds, it has probably been cut. a lot.
many people cut their product with creatine. creatine is NOT water-soluble. which means if you drop some product into a glass of water, it should dissolve into the water. this also means that if your product is cut with creatine, that stuff just sits in your sinuses and is not broken down until it hits your stomach. because many people use this in their product, you should always do a nasal rinse after a sesh.
tying in with the end of #7, cocaine is very acidic. you should always do a nasal rinse after using coke. this is because the acidic product, if left in your nose/sinuses, will eat away at your tissue and over time will cause some serious damage.
cocaine usage can cause epiglottitis, a serious infection of the tissue/muscle that blocks your windpipe when you swallow something. this infection can be fatal if not treated early on. symptoms of this infection include: fever, cough, swollen lymph nodes, swelling of the throat, stridor (a whistling sound when you breathe), drooling, stiff neck, muscle aches, visible epiglottis that is inflamed/pinkish reddish. when you have this infection, your throat may swell shut at any time, so it is crucial to get treated as soon as possible.
this should be common knowledge, but hey some people didn't get into drugs with much knowledge about them. if you are chattering your teeth when high on cocaine, this means there are amphetamines present in your product.
cocaine typically makes people need to go #2. amphetamines, however, can cause constipation and smaller poops, along with opiates. so if you're feeling a bit stuck, you should probably test your product.
not really a fact, but some advice: to avoid getting product stuck in your nose after taking a bump or a line, rather than being dissolved and absorbed into your sinuses/dripping down your throat, try getting your pinky wet (with spit or water) and sniff it up there to ensure that it reaches its destination!
some more advice: always always ALWAYS be sure to drink plenty of water while on cocaine! after a night of sniffing and not drinking enough water, your lips will get super chapped and your mouth will be dry in the morning, along with that weird taste in your mouth.
last piece of advice: cocaine is a powerful substance. treat it with respect and set firm limits for yourself. as soon as you stop respecting the substances you put in your body, they will demonstrate to you exactly why you should.