Methods for the manufacture of colorfast masonry

A method of manufacture of simulated-stone masonry comprising:

• combining a pigment with particles of an aggregate material to form a mixture wherein the mixture contains 5% or less of water by weight;
• agitating the mixture to disburse the pigment over surfaces of the particles;
• adding 1% of water to the mixture and continue agitating the mixture;
• combining the pigmented particles with urease enzyme or urease-producing cells or spores, nutrients, a calcium source and a nitrogen source to form a composition;
• adding one or more additional pigments to the surface of the composition;
• incubating the composition for a period of time to form calcium carbonate;
• forming the simulated-stone masonry.

A method of manufacturing a pigmented masonry comprising:

• mixing a combination of at least one pigment and particles of at least one aggregate material with urease and/or urease-producing cells or spores, water, nutrients, a calcium source and a nitrogen source;
• depositing or extruding the mixture into a form;
• and
• incubating the mixture for a period of time to allow the formation of covalent bonds between the particles, wherein the covalent bonds affix the at least one pigment to surfaces of the particles;
• and
• forming the pigmented masonry.