Moissanite is a gemstone that is composed of silicon carbide, and it is not colorless because of its inherent chemical composition and crystal structure. Unlike diamonds, which are made entirely of carbon, moissanite contains other elements such as silicon, which can contribute to its coloration.
Moissanite can exhibit a chameleon-like behavior because of its ability to change color under different lighting conditions. This phenomenon is caused by the gemstone's unique optical properties, which can cause it to reflect different wavelengths of light depending on the lighting source.
Under certain lighting conditions, moissanite may appear to be more yellow or brown, while under other lighting conditions, it may appear more colorless. This is because the gemstone's dispersion, or the separation of white light into its component colors, is higher than that of diamonds, making it more prone to displaying this chameleon-like behavior.
Overall, while moissanite is not colorless and can exhibit chameleon-like behavior, it is still a highly sought-after gemstone because of its beauty, durability, and affordability compared to diamonds.