Which describes a characteristic of quartzite? igneous
foliated
does not split into layers
grains arranged in parallel layers

sure what is it? ^w^

can you attach a picture of the lettuce? : )

the answer for sodium is 0.186

the answer for rubidium is 0.251

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).