When seeing how old a spear/ arrow head is how do they know the age of when it was carved/made and not how old the rock itself is?

Question

When seeing how old a spear/ arrow head is how do they know the age of when it was carved/made and not how old the rock itself is?

In: Earth Science

Answer 1

There is a saying in archaeology: If it is outside of a context, it is worthless.

So yes, more or less, it is difficult to date object itself, especially stone one… Sometimes you make an educated guess based on style or material, but in most cases you rely on context.