Solids
A material with definite properties and definite chemical composition is called a pure substance.
Minerals have a definite chemical composition, are solid, are inorganic, are naturally occurring, and have a crystalline structure.
Colon is an organ not a compound with definite composition.
Yes, a mixture does not obey the law of definite composition. Mixtures can have varying proportions of different substances, whereas compounds, which obey the law of definite composition, have a fixed ratio of elements.
Yes
A definite chemical composition
yes it can
Substance
a substance
Yes
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Yes, fluorite has a definite chemical composition: it is a calcium fluoride mineral with the chemical formula CaF2.