This depends on your needs !
For example the melting point.
The most useful physical property for identifying galena would be its metallic luster and its high density. Galena has a metallic luster and is one of the densest minerals, so these characteristics can be helpful in distinguishing it from other minerals.
Density is useful for identifying an unknown material because it is a physical constant. A physical constant is a unique characteristic of the material in question. This constant never change or vary with the shape or amount of the material/substance.
physical property
The most useful physical property when classifying a rock is its mineral composition. This includes identifying the specific minerals present in the rock and their relative proportions. By analyzing these properties, geologists can categorize rocks into different types based on their mineral content.
The state of matter is a physical property.
Color, It can point you in the right direction but color lies all the time
physical property
It is a physical property.
Dullness is a physical property.
i am pretty sure it is a physical property! :)
physical property