The large crystals in the rock will be very useful for describing the texture of the rock.
Depending on the rock type, this large, well formed crystals can take different names and can help a geologist make some assumptions about the pressure and temperature condition the rock was formed.
Texture refers to the grain size, orientation, form and shape in a rock.
Color is the hue of a rock and the pigment it contains.
Hardness is the resistant of minerals to breakage.
Layering is the concentration of minerals in a rock mass from one unit to another.
Layering often lead to banding and foliations in rocks.
