The sizes,shapes,and positions of the grains that make up a rock.
Grain
Grain
yes
A texture that gives the rock a layered appeareance.
a foliated rock is a metamorphic rock with a texture that gives the rock a layered appearance.
Slate rock has a fine-grained texture, with individual mineral grains that are too small to be seen with the naked eye. This gives slate a smooth and dense appearance.
Gneiss rock typically has a coarse texture due to its mineral composition of interlocking grains of quartz, feldspar, and mica. This gives it a banded or foliated appearance, with distinct layers or bands of different mineral compositions.
The texture of a rock depends on the minerals and/or fossils it contains, as well as the processes the components of the rock went through when it was form. For example, a pumice rock (the one that has a lot of holes) has its texture because the magma that form it lost a lot gas, and while the gas escaped the holes started to form. On the other side, some sedimentary rocks have a lot fossils which gives them their specific texture as well as sedimentary rocks can have ripples which means the sediments that constitute that rock were joint together in a beache where waves were moving constantly. The shape of these waves can tell geologists the direction of the current when the rock was formed.
The word that describes the shapes and sizes of grains in a rock is "texture." Texture refers to the arrangement and size of mineral grains in a rock, whether they are fine-grained, coarse-grained, or other specific characteristics.
no texture
well it depends. if its agray rock, it has a gray texture. if its a gold rock, it has a high value texture. etc
The size of the mineral crystals in an igneous rock determines the rock's texture.