What would happen if you rubbed a piece of fluorite against a piece of feldspar?

If you rub a piece of fluorite against a piece of feldspar, you would likely observe that the fluorite leaves a streak on the feldspar due to its lower hardness on the Mohs scale. Fluorite has a hardness of 4, while feldspar ranges from 6 to 6.5, meaning feldspar is harder and would not be scratched by fluorite. The interaction may produce some fine dust from the fluorite, but it would not result in significant abrasion of the feldspar.