There are many different types of solutions. All a solution is, is the combination of one state of matter put into another state of matter. A solid into a solid. A solid into a liquid, and a liquid into a liquid. All of these are solutions.
Crystals can form from vapors, solutions, or molten materials.
No one knows how the crystals can come together and make the formation. Crystals grow from the outside, unlike that of a human being. Particles are attracted to the seed of the formation and then build on up in an orderly pattern. Time and freedom are needed for the molecules to make perfect crystals. Crystals can form from a solid, liquid, or gas.