How is cocaine crushed into powder?

Its for a health class project and i couldnt find it anywhere else.How is cocaine crushed into powder?
some general public use a cocaine grinder that looks like a pepper grinder, others fold it up within a dollar bill and go over the bill near a pen, lighter or w/e to crush it then chop it up near a card. Others will put it on some glass or a mirror and chop at it next to a razor blade. I'm sure there's millions of ways but those are most adjectives.
With a hammer
in recent times admit it, you are holding an eight orb...
take the rocks, lay 'em out on a table, appropriate a dollar bill and put it over the rocks, then use a credit card or license to press down on the bill (over the rocks.) later pull the bill bad, careful! do not spill!1 and afterwards use the edge of card to break it up even more, consequently draw out the lines.....enjoy,
what a strange sound out to be talking something like in vigour class.
"Sabel" and "Swift" got you covered pretty very well.