Fluorspar or Fluorite (CaF₂)
Fluorspar, also known as fluorite, is a mineral composed mainly of calcium fluoride, and is widely used in ceramics as a flux for glazes. Its main function is to reduce the melting point of the glaze, which facilitates its melting at lower temperatures, allowing a more efficient vitrification.
Fluorspar is found in a wide variety of colors, ranging from colorless to more vibrant shades such as purple, green and blue, depending on the impurities contained in the mineral. These color variations can influence the final shade of the glazes in which it is used. For example, the presence of green or blue fluorite can impart soft tints to glazes, while purple fluorspar can generate deeper, more vibrant hues.
In addition to its role as a flux, fluorspar can affect glaze coloration, producing delicate shades such as pink or pale green tones, making it a valuable component in the creation of complex, decorative visual effects.Interesting Fact
Although fluorspar is mainly known for its use in ceramics, it is also used in glass manufacturing and in the metallurgical industry. In addition, its transparent or colored crystals are used for decorative purposes and in jewelry.Helpful Tip
When using fluorspar in your glazes, be sure to test small amounts before applying it to the entire piece, as it can influence the final colors in unpredictable ways, depending on other components of the formula.
