It certainly is not rock salt. It is a shame that WA strips out punctuation. Try searching your reading or notes for the word "Flint".
Why is quartz harder steel
A striker is used to light a flame, for instance the Bunsen burner flame. The striker does this by using flint to strike a rugged surface. Flint is a form of quartz that emits a spark when struck, thus this is why it is called a striker.
wsh it wid water
Stainless reply: want to know steel grades other than stainless against corrosion
The individual sand grains are most likely quartz which is harder on the Mohs hardness scale than steel tools and implements.
Flint is a hard rock that produces a spark when struck against steel. Flint is a sedimentary rock that is formed from a crypto crystalline quartz.
If you rub pyrite against steel sparks would fly.
Why is quartz harder steel
You could start a fire with quartz, flint, or shert rocks if you are lost in the wilderness and you have a steel pocket knife to strike them with to form sparks. You could buy a quartz countertop for your kitchen.
According to an IVillage expert, you should use volcanic rocks if available. Why? Because rocks from a stream or other water source tends to be wet and when they are lighted on fire they have been known to cause serious injury because they have been shown to explode. But not volcanic rock because it tends to be dry regardless of the conditions. Hope this helps.
it farts
The rock used for fires is "flint," a usually dark-colored or glassy quartz that will strike sparks off iron, steel, or other ferrous materials such as pyrite.
yes
Yes it will when grinding or cutting like regular steel
yes
When the flint is struck by the steel, it creates sparks which can be directed at the tinder, and cause it to light, thus starting your fire.
steel file 6.5