Thaumasite is a mineral that occurs in hydrated calcium sulfate carbonated with carbonate and silicate. Although not a well-known mineral, a few synonyms exist for thaumasite. These synonyms include silicate-enriched gypsum, sulphate attack sulfate, and thaumasite cement. These terms are used interchangeably, depending on the context of the discussion. Silicate-enriched gypsum refers to the presence of silicates in the mineral, while sulfate attack sulfate is used to describe the corrosion of concrete that leads to the formation of thaumasite. Thaumasite cement highlights the use of the mineral in cement applications, where it has been used as a replacement for traditional Portland cement.