Where do 4 principal states of matter work together?

[phy666]

speaking of solid, liquid, gas, and plasma, where in nature do these four states of matter interact to form a discrete system?

the only example i know of, with my limited knowledge, is sun (plasma), Earth (solid), sea (liquid), and sky (gas) ... all work together to form something like a "gaia" system which sustains biomass. this may be a bit too novel, I'm just wondering if there are places in nature where these four principal states of matter work together, perhaps in a type of cell, engine, or some astrophysical phenomena.

strange question. I know this.

 

[Simon Bridge]

The solar system is not closed.
I think you need to more closely define your terms ... as it stands, "the Universe" would fit your description of a discrete system where all states of matter "work together". Also "a type of cell or engine" is not usually thought of as a "place in nature" - though it handily opens the question to the possibility of engineering the situation you are asking about.

Note:
you can get a solid-liquid-gas system in equilibrium (i.e. water at it's triple-point.)
gas-plasma discharge tubes have a gas and plasma (+ electric field) working together ... add ice to the chamber and you have your condition.

See? The question, as stated, is so vague there are probably infinite possibilities.