It depends on the size of the rock. If you are trying to make a triangle shape with one side being pointy, go to some asphalt or concrete and rub on both sides until its sharp
On a rock
Often, yes.
To sharpen a stick quickly using a rock, find a sharp-edged rock and hold the stick at an angle against it. Rub the stick against the rock in a back-and-forth motion, rotating it as needed to sharpen all sides. Repeat until you achieve the desired sharpness.
yes by giving precise force on the razor by the rock can make it sharp
Pick up a rock. Or a stick. sharpen the stick to a point with the rock. Done.
If you're asking what volcanic rock can be sharpened as a cutting tool, the answer is obsidian.
No idea. You might do a search on "scythe stone", which is a sharpening stone used to sharpen scythes.
You hold it firmly and rub it at an angle on apiece of abrasive material like a rock, or smooth concrete.
to sharpen (a knife or any blade) is "aiguiser" in French. To sharpen a pen is "tailler un crayon".
The verb of sharpness is sharpen. As in "to sharpen something".
Sandstone is commonly used as a grinding stone to sharpen tools due to its abrasive properties. Its rough texture helps to remove material from the tool surface and create a sharp edge.
It is wiser to sharpen your wit, instead of your tongue. I would like to sharpen my pencil, please.