Zinc sulfide synthesized in six systems (Zn-S-H₂O, ZnO-S-H₂O, ZnCl₂-S-H₂O, ZnCl₂-S-CaCO₃-H₂O, ZnCl₂-S-Na₂CO₃-H₃O, ZnCl₂-Na₂S-H₂O) of aqueous solution at 250°C and 300°C were exmained by the x-ray diffraction method. Wurtzite and sphalerite formed simultaneously in the system ZnCl₂-S-Na₂CO₃-H₂O; minerals synthesized in other five systems were all sphalerite. The chemical species resulted from the chemical reactions in each system certainly regulate the environmental conditions and, therefore, play an important role in the mineral syntheses. Wurtzite is associated with sulfate (HSO₄^-, SO₄^--) as dominant sulfur species produced in the system, where the higher the pH value of the solution, the more wurtzite is produced. On the contrary, sphalerite forms in the sulfuric and hydrochloric acid solutions containing dominantly hydrogen sulfide and native sulfur.