A method of manufacturing a metal mold for replicating a component having a predetermined three-dimensional shape, the manufacturing method comprising: (a) fabricating a glass-based mold by using a moldable nanocomposite comprising an organic binder and glass particles dispersed therein, the glass-based mold having the predetermined three-dimensional shape and being obtained as follows: (i) shaping the moldable nanocomposite into the predetermined three-dimensional shape before, during and/or after hardening of the organic binder, thereby obtaining a primary structure; (ii) debinding the primary structure obtained in step (i) by removing the organic binder, thereby obtaining a secondary structure, the secondary structure having cavities formed therein; (iii) optionally filling the cavities of the secondary structure obtained in step (ii) with at least one glass-forming precursor; and (iv) sintering the secondary structure obtained in step (ii) optionally filled with at least one glass-forming precursor in step (iii), thereby obtaining the glass-based mold; and (b) replicating the glass-based mold obtained in step (a) by melting a metal inside the glass-based mold or by melting a metal outside the glass-based mold and pouring it onto or into the glass-based mold, followed by cooling, or by pressing the glass-based mold into a malleable metal substrate, thereby obtaining the metal mold for replicating the component, the metal mold having the predetermined three-dimensional shape inverted, wherein the glass particles of the moldable nanocomposite comprise a first type of glass particles having a diameter in the range from 5 nm to 500 nm. (a) fabricating a glass-based mold by using a moldable nanocomposite comprising an organic binder and glass particles dispersed therein, the glass-based mold having the predetermined three-dimensional shape and being obtained as follows: (i) shaping the moldable nanocomposite into the predetermined three-dimensional shape before, during and/or after hardening of the organic binder, thereby obtaining a primary structure; (ii) debinding the primary structure obtained in step (i) by removing the organic binder, thereby obtaining a secondary structure, the secondary structure having cavities formed therein; (iii) optionally filling the cavities of the secondary structure obtained in step (ii) with at least one glass-forming precursor; and (iv) sintering the secondary structure obtained in step (ii) optionally filled with at least one glass-forming precursor in step (iii), thereby obtaining the glass-based mold; and (i) shaping the moldable nanocomposite into the predetermined three-dimensional shape before, during and/or after hardening of the organic binder, thereby obtaining a primary structure; (ii) debinding the primary structure obtained in step (i) by removing the organic binder, thereby obtaining a secondary structure, the secondary structure having cavities formed therein; (iii) optionally filling the cavities of the secondary structure obtained in step (ii) with at least one glass-forming precursor; and (iv) sintering the secondary structure obtained in step (ii) optionally filled with at least one glass-forming precursor in step (iii), thereby obtaining the glass-based mold; and (b) replicating the glass-based mold obtained in step (a) by melting a metal inside the glass-based mold or by melting a metal outside the glass-based mold and pouring it onto or into the glass-based mold, followed by cooling, or by pressing the glass-based mold into a malleable metal substrate, thereby obtaining the metal mold for replicating the component, the metal mold having the predetermined three-dimensional shape inverted,