Our study reveals that the green copper sulfide synthesis from sodium thiosulfate and copper salts is a two-step process, where an intermediate product acts as a sacrificial template. The effect of various synthesis parameters, including the temperature applied in both reaction steps, solvent composition (water and ethylene glycol in ratios of 1:0, 3:1, 1:1, and 1:3), and copper precursor (CuSO4, Cu(NO3)2, CuCl2), on the morphology of the intermediate and final products was investigated in detail. By adjusting the ethylene glycol content, it was possible to obtain a hexagonal rod-like intermediate product with varying dimensions, which decomposed into tubular copper sulfide at room temperature. In aqueous solvents with a low precursor concentration (