gtoker1
contestada

If a mineral can scratch fluorite and it can be scratched by a knife what is the hardness of the mineral

Respuesta :

Answer:

The hardness rating is 4.

Explanation:

Calcite sits at a hardness rating of 3 and is very easily scratched with a knife and/copper coin.  This is where most Marbles, limestones, travertines, rate.

Meanwhile, Fluorite sits at hardness 4 and can be scratched by a knife.