Which information can be determined from the litmus paper tests? A Solutions 1 and 5 are both acids.
B. Solutions 2 and 8 are both neutral.
C. Solutions 3 and 6 are both bases.
D. Solutions 4 and 7 are both acids.

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).