Which of the following properties is most useful in mineral identification?

1.- hardness

Rock/mineral varieties are categorised in 3 important communities: igneous, sedimentary and metamorphic. To ultimate hit upon minerals is with the help of color (yet do no longer constantly circulate with the help of color because of the fact maximum minerals seem the comparable, this is not the final way), luster is it shinier, uninteresting etc.., each and every so often style halite style somewhat salty on an analogous time as their is a rock that looks like halite yet does not have a style, some rocks are florescent under a black easy, do a scratch attempt are you able to scratch the mineral with the help of your fingernail or do you would be able to desire to apply a nail, cleavage, a bead attempt, putting acid on a rock if it fizzes this is a limestone of a few type, streak attempt. The checklist is going on and on!