Tincalconite is a mineral composed of hydrated sodium borate, with the chemical formula Na2B4O7·5H2O. It typically forms in evaporative environments, such as salt flats and borate deposits, where boron-rich waters evaporate. Tincalconite is often found in association with other borate minerals like borax and ulexite. This mineral is usually white or colorless and has a glassy luster. Tincalconite is important in the production of boron compounds, which are used in various applications, including glassmaking, ceramics, and fertilizers. Its unique properties make it a subject of interest in mineralogy and industrial applications.