Blue John Specifications
Blue John Specifications include its chemical, physical and optical properties of natural gemstones. These are displayed through measurements of light dispersion, hardness, density or specific gravity, cleavage, fracture, tenacity, refractive index and luster. These properties vary depending on the type of natural gemstone. Here, to give you a basic insight about Blue John, we provide you with a few prominent Blue John facts.
Chemical formula is majorly responsible in contributing the Physical Properties of Blue John. It is mainly composed of CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006).